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Liquids Allowed and Forbidden During Intermittent Fasting

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  • Post last modified:October 8, 2023

Today, we’re diving into the topic of which liquids are acceptable and which are not during intermittent fasting. This is crucial because many individuals unknowingly sabotage their fasting efforts. Instead of learning through trial and error, it’s wiser to learn from others’ experiences.

A true fast traditionally means consuming only water. However, due to the nutrient deficiencies prevalent today, many experience side effects when they fast without supplementing certain nutrients. Some drinks can negate the benefits of fasting, so it’s essential to know which ones.

Breaking a fast or getting out of ketosis or autophagy (where old proteins are recycled and new ones are produced) can be confusing. Anything that spikes insulin can disrupt the benefits of fasting. However, consuming pure fat or fiber doesn’t trigger insulin. But remember, dietary fat is burned before body fat. So, while you might be in ketosis, the ketones might be coming from the dietary fat, not your body fat, which can halt weight loss.

Here’s a quick rundown of what you can and can’t drink during fasting:



Definitely yes. But avoid tap water filled with chemicals. Use a filter. Spring water is ideal. Drinking more water during fasting is recommended, especially if you’re prone to kidney stones.

can you drink water during intermittent fasting

Water is the most fundamental and essential drink during intermittent fasting. It keeps the body hydrated, aids in cellular processes, and helps flush out toxins. When you’re fasting, your body isn’t receiving fluids from food, so drinking adequate water becomes even more crucial.

Tap Water Concerns: Many urban areas around the world rely on tap water for daily consumption. However, tap water can sometimes contain contaminants. These might include:

Chemicals: Chlorine is commonly used to treat bacteria in tap water, but it can react with other organic compounds to form harmful byproducts.

Heavy Metals: Lead, which can leach from pipes, and other metals can sometimes be found in tap water.

Pesticides and Herbicides: Runoff from agricultural areas can introduce these chemicals into water sources.

Pharmaceuticals: Traces of medications can sometimes be found in tap water, having entered the water supply through human waste or discarded medications.

Microorganisms: Bacteria and viruses can sometimes be present, especially if the water treatment process is compromised.

Given these concerns, using a water filter can help reduce or eliminate many of these contaminants, providing cleaner, safer water for consumption.

Spring Water: Nature’s Filter

Spring water is often considered one of the purest forms of water because it comes from underground sources and is naturally filtered by the earth. It contains essential minerals like calcium, magnesium, and potassium, which are beneficial for health. When choosing bottled spring water, it’s essential to ensure it’s sourced from reputable springs and hasn’t been subjected to excessive processing, which might strip away its natural benefits.

Increased Water Consumption During Fasting

During fasting, the body is not receiving water from foods, which typically contribute to daily hydration. Therefore, drinking water becomes even more essential. Additionally, as the body burns fat during fasting, it produces waste products that need to be flushed out. Drinking water aids in this detoxification process.

For those prone to kidney stones, water plays a crucial role. Kidney stones form when there’s a high concentration of certain substances in the urine. Drinking plenty of water helps dilute these substances, reducing the risk of stone formation. It’s often recommended to consume at least 2.5 liters of fluid daily for those at risk.

In conclusion, while water is a simple and basic necessity, its role during intermittent fasting is multifaceted. Ensuring you’re consuming clean, quality water in adequate amounts can significantly enhance your fasting experience and overall health.

Apple Cider Vinegar

Glass of apple juice and apples on a black background. Selective focus.

Yes. It aids digestion, helps with blood sugar levels, and boosts energy.

Apple cider vinegar is made through the fermentation of apple cider. The sugar in the apples is first fermented by yeast to become alcohol, and then it undergoes a second fermentation process where bacteria turn the alcohol into acetic acid. This acetic acid, combined with the vitamins, minerals, and other compounds in the apples, gives ACV its unique properties.

  1. Aids Digestion

Stomach Acid Balance: ACV can help balance the pH level in the stomach. A more acidic environment in the stomach can aid in the digestion of food, especially proteins. This can be particularly beneficial for those with low stomach acid, a condition known as hypochlorhydria.

Pectin Content: ACV contains pectin, a type of soluble fiber found in apples. Pectin can help soothe the gastrointestinal tract and promote regular bowel movements.

Beneficial Bacteria: The fermentation process introduces beneficial bacteria into the vinegar. These probiotics can support a healthy gut microbiome, which plays a crucial role in digestion and overall gut health.

  1. Helps with Blood Sugar Levels

Improved Insulin Sensitivity: ACV has been shown to improve insulin sensitivity during high carb meals, which can help lower post meal blood sugar levels. This is particularly beneficial for those with insulin resistance or type 2 diabetes.

Delayed Stomach Emptying: ACV can increase the feeling of fullness and delay stomach emptying, leading to a more gradual absorption of sugar into the bloodstream.

Enzyme Inhibition: ACV can inhibit enzymes that digest starch, reducing the amount of sugar that enters the bloodstream.

  1. Boosts Energy

Acetic Acid: The primary acid in ACV, acetic acid, has been shown to boost energy production in cells. It can also help prevent the buildup of lactic acid in the body, which can lead to fatigue.

Potassium and Enzymes: ACV contains potassium and enzymes that can help relieve feelings of tiredness.

Amino Acids: ACV contains amino acids, the building blocks of proteins, which can act as a counteractant to lactic acid buildup, further reducing feelings of fatigue.

In the Context of Intermittent Fasting

When fasting, the body undergoes various metabolic shifts. ACV can support these shifts by promoting stable blood sugar levels, aiding digestion for the meals you do consume, and providing an energy boost during fasting periods. Moreover, the feeling of fullness induced by ACV can be beneficial during fasting, helping to reduce the sensation of hunger.

In conclusion, apple cider vinegar offers a range of benefits that can complement and enhance the effects of intermittent fasting. However, it’s essential to consume it in moderation and preferably diluted to avoid any potential side effects on tooth enamel or the digestive tract.

Lemon Juice

Clear Drinking Glass With Slice Lemon

Yes, especially from fresh lemons. It helps prevent kidney stones and supports liver and gallbladder functions.

Lemon juice is derived from the fruit of the lemon tree, a small evergreen tree native to Asia. It’s a rich source of vitamin C and contains other vitamins, minerals, and beneficial compounds. When consumed, especially from fresh lemons, it offers several health benefits.

  1. Prevention of Kidney Stones

Citrates: Lemon juice is rich in citrates, which can increase urine volume and alkalize the urine. This can help prevent the formation of kidney stones, particularly calcium oxalate stones, which are the most common type. The citrate in the lemon juice binds to calcium in the urine, reducing the risk of calcium oxalate stone formation.

Hydration: Regular consumption of lemon water promotes hydration, which is essential for preventing kidney stones. Adequate fluid intake ensures that the substances responsible for stone formation are diluted in the urine.

  1. Supports Liver Function

Detoxification: Lemon juice can stimulate the liver to produce bile, a digestive juice that aids in the emulsification of fats and supports the liver’s detoxification pathways. This can help in the elimination of toxins from the body.

Antioxidants: Lemons are rich in antioxidants, particularly vitamin C and flavonoids. These compounds can protect liver cells from oxidative damage, which can contribute to liver disease.

  1. Aids Gallbladder Function

Stimulating Bile Production: As mentioned, lemon juice stimulates the liver to produce bile. This not only aids in digestion but also ensures the regular flow of bile from the gallbladder, reducing the risk of bile stagnation and gallstone formation.

Reducing Gallbladder Inflammation: The anti inflammatory properties of lemon juice can help reduce inflammation in the gallbladder, which can be beneficial for those with gallbladder issues.

Additional Benefits

Digestive Health: The acidic nature of lemon juice can mimic the gastric juices in the stomach, aiding in the breakdown of food and promoting healthy digestion.

Alkalizing Effect: Despite its acidic nature, lemon juice has an alkalizing effect on the body once metabolized. This can help balance the body’s pH levels, promoting overall health.

Vitamin C Boost: Being a rich source of vitamin C, lemon juice supports the immune system, aids in collagen production, and offers antioxidant protection.

In conclusion, lemon juice, especially when sourced from fresh lemons, offers a plethora of health benefits. When incorporated into a balanced diet, it can support various bodily functions, from kidney health to liver and gallbladder functions. However, it’s essential to consume it in moderation and consider diluting it to protect tooth enamel from its acidic nature.

Diet Soda

Diet soda in a glass on the background of the sea and sunset

No, especially those with artificial sweeteners like aspartame. However, those sweetened with stevia or monk fruit are acceptable.

Diet sodas are often marketed as zero calorie or low calorie beverages, making them seem like an attractive option for those who are fasting. However, the ingredients they contain, especially the sweeteners, can have significant implications for those trying to reap the benefits of fasting.

  1. Artificial Sweeteners: Aspartame and Others

Insulin Response: While artificial sweeteners like aspartame don’t contain calories or sugar, some studies suggest they might still provoke an insulin response. Insulin is the hormone responsible for lowering blood sugar levels, and one of the primary goals of fasting is to reduce insulin levels. An unexpected insulin spike can potentially disrupt the benefits of fasting.

Gut Health: Artificial sweeteners can negatively impact the gut microbiome, altering the balance of beneficial bacteria. This can lead to digestive issues and has been linked to metabolic disturbances.

Appetite and Cravings: Some research indicates that consuming artificial sweeteners can increase appetite and sugar cravings. This is counterproductive during fasting, where the goal is often to reduce overall food intake and curb sugar cravings.

Neurological Concerns: Aspartame, in particular, has been controversial due to concerns about its potential neurological effects, including headaches and dizziness in some individuals.

  1. Natural Sweeteners: Stevia and Monk Fruit

No Caloric Content: Both stevia and monk fruit are natural sweeteners that don’t contribute calories to the diet. This makes them more compatible with the goals of fasting.

Minimal to No Insulin Response: Unlike artificial sweeteners, stevia and monk fruit have been shown to have little to no impact on insulin levels, making them more fasting friendly.

Gut Health: There’s less evidence to suggest that these natural sweeteners disrupt the gut microbiome compared to their artificial counterparts.

Other Benefits: Some studies suggest that stevia might have additional health benefits, such as lowering blood pressure and reducing blood sugar levels in people with diabetes.


While diet sodas might seem like a harmless beverage choice during fasting due to their low or zero calorie content, the type of sweetener they contain matters. Artificial sweeteners, especially aspartame, can potentially disrupt the benefits of fasting. On the other hand, natural sweeteners like stevia and monk fruit are generally considered more acceptable during fasting. However, it’s essential to note that individual responses can vary, and it’s always a good idea to monitor how any food or drink affects your body during fasting.



Black coffee is fine. But be cautious with caffeine intake as it can disrupt sleep. Organic coffee is preferable.

Coffee, especially when consumed black without additives, is a popular choice for many during fasting periods. It offers not only a boost of energy but also several health benefits that can complement the fasting process.

  1. Black Coffee and Its Benefits

Caloric Content: Black coffee essentially has zero calories, making it an ideal choice during fasting. It doesn’t provide any energy in the form of carbohydrates, proteins, or fats, ensuring that the body remains in a fasting state.

Metabolism Boost: Caffeine, a primary component of coffee, can increase metabolic rate, aiding in the burning of calories. This can be particularly beneficial for those fasting for weight loss.

Appetite Suppression: Some people find that caffeine can act as an appetite suppressant, reducing feelings of hunger during fasting periods.

Antioxidants: Coffee is rich in antioxidants, which can neutralize harmful free radicals in the body. These antioxidants can support cellular health and reduce inflammation.

  1. Caffeine and Its Effects

Sleep Disruption: Caffeine is a stimulant that can interfere with the sleep wake cycle. Consuming coffee, especially in the afternoon or evening, can lead to difficulties falling asleep or staying asleep. Disrupted sleep can counteract some of the benefits of fasting, as adequate sleep is crucial for recovery, hormone balance, and overall health.

Adrenal Response: In some individuals, excessive caffeine can stimulate an adrenal response, leading to increased cortisol levels. Elevated cortisol can interfere with the benefits of fasting, such as fat burning and autophagy.

Tolerance and Dependence: Regular and excessive caffeine consumption can lead to increased tolerance, meaning one might need more coffee over time to achieve the same effects. It can also lead to dependence, with withdrawal symptoms like headaches, fatigue, and irritability if one skips their regular coffee dose.

  1. Organic Coffee

Pesticide Residue: Coffee plants are often treated with pesticides and herbicides. Residues from these chemicals can remain on the coffee beans and potentially make their way into your cup. Organic coffee is grown without synthetic pesticides and herbicides, reducing the risk of consuming these residues.

Environmental Impact: Organic coffee farming practices are generally more sustainable and environmentally friendly. They often promote soil health, reduce water waste, and support biodiversity.

Flavor and Quality: Many coffee enthusiasts believe that organic coffee offers a cleaner, richer flavor profile compared to conventionally grown beans.


While black coffee can be a beneficial beverage during fasting periods, it’s essential to be mindful of caffeine intake and its potential side effects. Opting for organic coffee can provide a cleaner, more environmentally friendly option, enhancing the fasting experience. As with any dietary choice during fasting, it’s crucial to listen to your body and adjust based on individual responses.

Bulletproof Coffee

coffee, cafe, latte, cappuccino, whipped cream, cup

It’s okay initially, but if you’re trying to lose weight, the added fats might slow down your progress.

Bulletproof coffee is a concoction that typically consists of black coffee blended with grass fed butter and medium chain triglyceride (MCT) oil. It’s been popularized as a high fat beverage that can provide sustained energy, especially for those following a ketogenic diet.

  1. Benefits of Bulletproof Coffee

Sustained Energy: The fats in Bulletproof coffee, especially MCT oil, are rapidly absorbed and converted into ketones. Ketones are an alternative energy source for the brain and body, providing steady energy without the spikes and crashes associated with sugary beverages.

Appetite Suppression: The fats in the coffee can promote feelings of fullness, potentially reducing overall food intake later in the day.

Cognitive Boost: Many proponents of Bulletproof coffee claim enhanced cognitive function, including improved focus and clarity, due to the ketones produced from the MCT oil.

Supports Ketosis: For those on a ketogenic diet, Bulletproof coffee can help maintain a state of ketosis, where the body primarily burns fat for fuel.

  1. Bulletproof Coffee and Fasting

Doesn’t “Break” the Fast: While Bulletproof coffee does contain calories from fat, it doesn’t have proteins or carbohydrates. Therefore, it doesn’t cause a significant insulin response, which means it technically doesn’t “break” a fast in the traditional sense. However, it does provide energy, which might alter some metabolic aspects of fasting.

Nutrient Boost: The grass fed butter in Bulletproof coffee provides beneficial fatty acids, and the MCT oil offers a quick source of energy. These can be especially helpful during extended fasts, providing the body with essential fats.

  1. Potential Drawbacks for Weight Loss

Caloric Intake: Despite being carb free, Bulletproof coffee is calorie dense due to the added fats. For those aiming for weight loss, consuming a beverage with several hundred calories might slow down progress, especially if it’s in addition to regular meals.

Over reliance: There’s a risk of becoming overly reliant on Bulletproof coffee for energy and satiety, potentially missing out on essential nutrients from whole foods.

Digestive Concerns: Some people might experience digestive discomfort or diarrhea from the high fat content, especially MCT oil.


Bulletproof coffee can be a beneficial addition to a fasting regimen, especially for those following a ketogenic diet or those new to fasting who need the added support. However, for individuals fasting primarily for weight loss, the added calories from the fats in Bulletproof coffee might slow down their progress. It’s essential to consider individual goals, metabolic responses, and overall dietary intake when deciding to incorporate Bulletproof coffee into a fasting routine.

Half and Half vs. Cream

close up of a white liquid chocolate swirl on white background studio

Cream, having zero carbs, is preferable. But the difference is minimal.

Both half and half and cream are dairy products derived from milk. Their primary distinction lies in their fat content and how they’re produced.

  1. Nutritional Profiles

Half and Half: As the name suggests, half and half is typically made by combining equal parts whole milk and cream. This results in a product that has a moderate fat content. Nutritionally, half and half contains both fats and carbohydrates (from the milk sugars or lactose). Depending on the brand and serving size, two tablespoons might have around 1.6 grams of carbs.

Cream: Cream, especially heavy or whipping cream, has a higher fat content and virtually no carbohydrates. This is because it’s the fatty portion that’s skimmed off the top of milk before the milk is homogenized. Two tablespoons of heavy cream typically contain less than 1 gram of carbs, making it virtually carb free.

  1. Implications for Fasting

Insulin Response: One of the primary goals of fasting is to reduce insulin levels. Consuming products with carbohydrates, even in small amounts, can trigger an insulin response. While the carbs in half and half might be minimal, for those aiming for strict fasting, even this small amount might be of concern. Cream, being virtually carb free, is less likely to provoke an insulin response.

Caloric Content: Both half and half and cream are calorie dense due to their fat content. While they won’t significantly impact insulin, they do provide energy. For those fasting for weight loss, it’s essential to consider the caloric intake from these additions.

Satiety: The fats in both half and half and cream can promote feelings of fullness, potentially aiding those who might feel hungry during their fasting window.

  1. Taste and Texture

Half and Half: It offers a creamy texture and rich taste without being overly heavy. It’s commonly used in coffee to add a touch of creaminess without the full weight of cream.

Cream: Due to its high fat content, cream provides a much richer and thicker consistency. It can make beverages and dishes taste more indulgent.


When it comes to fasting, the choice between half and half and cream largely depends on individual goals and preferences. Cream, with its near zero carb content, is preferable for those aiming to minimize all carbohydrate intake during their fasting window. However, the difference in carb content between the two is minimal, and for many, it might not have a significant impact on their fasting outcomes. It’s essential to consider the broader context of one’s diet, the reasons for fasting, and personal taste preferences when making a choice.

Bone Broth

Bone Broth in a bowl on a wooden table. Selective focus.

No, due to its protein content.

Bone broth is a nutrient rich liquid made by simmering animal bones, often with vegetables, herbs, and spices, for an extended period. This process extracts various nutrients from the bones, resulting in a flavorful and nourishing broth.

  1. Nutritional Composition

Protein: One of the primary components of bone broth is protein, particularly in the form of collagen and gelatin. The protein content can vary depending on the preparation method and the type of bones used, but a typical serving of bone broth might contain around 5 10 grams of protein per cup.

Minerals: Bone broth is a good source of essential minerals like calcium, magnesium, phosphorus, and potassium, which are leached from the bones during the simmering process.

Amino Acids: Bone broth contains various amino acids, including glycine, proline, and glutamine, which have numerous health benefits.

  1. Implications for Fasting

Insulin Response: One of the primary goals of fasting is to reduce insulin levels and promote a metabolic state conducive to fat burning. Consuming protein, even in the form of bone broth, can trigger an insulin response. This is because protein, like carbohydrates, can stimulate insulin secretion, albeit to a lesser extent than carbs.

Autophagy: Another goal of fasting, particularly extended fasting, is to promote autophagy – a cellular “clean up” process where the body breaks down and recycles old and damaged cellular components. Protein intake can inhibit autophagy, so consuming bone broth might reduce this benefit of fasting.

Satiety and Nutrient Intake: On the positive side, the protein and minerals in bone broth can provide satiety and nourishment. For those who find it challenging to go through extended fasting periods, sipping on bone broth can offer some relief from hunger pangs and provide essential nutrients.

  1. Modified Fasting and Bone Broth

While traditional fasting protocols might exclude bone broth due to its protein content, some modified fasting approaches, often termed “bone broth fasts,” incorporate it. These protocols leverage the nourishing properties of bone broth to provide some sustenance while still keeping overall caloric intake low. Such approaches can be beneficial for those who want to experience some benefits of fasting but aren’t ready or able to do a complete water only fast.


In the context of strict intermittent fasting, bone broth might not be ideal due to its protein content, which can trigger an insulin response and potentially inhibit autophagy. However, for those looking for a more gentle or modified approach to fasting, or those seeking the specific nutritional benefits of bone broth, incorporating it can be a valuable strategy. As with any dietary choice during fasting, it’s essential to consider individual goals, health needs, and personal preferences.

Non dairy Creamers

: Avoid them due to their chemical content.

Non dairy creamers, often used as a substitute for milk or cream in beverages like coffee, are typically made from a combination of water, sugar, and vegetable oils. They also contain various additives to enhance their flavor, texture, and shelf life.

  1. Ingredients and Chemical Content

Vegetable Oils: Many non dairy creamers use hydrogenated or partially hydrogenated vegetable oils, which can contain trans fats. Trans fats are associated with increased LDL (bad) cholesterol, reduced HDL (good) cholesterol, and a higher risk of heart disease.

Sugar and Corn Syrup: Many non dairy creamers contain significant amounts of added sugars or corn syrup, which can spike blood sugar and insulin levels, counteracting the benefits of fasting.

Additives and Preservatives: To improve texture, flavor, and longevity, non dairy creamers often contain a range of additives, including artificial flavors, colors, thickeners, and preservatives. Some of these additives might be of concern for those seeking a clean, natural diet.

Emulsifiers: These are added to ensure the oil and water in the creamer mix well. Some emulsifiers have been linked to gut health issues and inflammation.

  1. Implications for Fasting

Insulin Response: One of the primary goals of fasting is to maintain low insulin levels. The sugars and corn syrups in many non dairy creamers can trigger an insulin response, potentially disrupting the fasting state.

Chemical Load: During fasting, one of the body’s goals is detoxification. Introducing a slew of artificial chemicals, preservatives, and potentially harmful fats can counteract this detoxification process.

Gut Health: The additives and emulsifiers in non dairy creamers can impact gut health, potentially disrupting the gut microbiome. A healthy gut is crucial for overall health, and some fasting protocols, especially extended ones, aim to promote gut health.

  1. Healthier Alternatives

For those who prefer a creamy texture in their beverages but want to avoid dairy and the chemicals in non dairy creamers, there are healthier alternatives available:

Nut Milks: Almond milk, cashew milk, and other nut based milks can offer a creamy texture without the unwanted additives. It’s best to choose unsweetened versions to avoid added sugars.

Coconut Cream: This is a rich, dairy free alternative that can add creaminess to beverages without added sugars or harmful fats.


While non dairy creamers might seem like a convenient and lactose free alternative to traditional milk or cream, they often come with a host of undesirable ingredients that can disrupt the benefits of fasting. For those practicing intermittent fasting, it’s essential to be mindful of what they’re adding to their beverages and opt for cleaner, more natural alternatives when possible.


Green tea and herbal teas are great, but be mindful of their caffeine content.

Tea, one of the world’s most consumed beverages, is derived from the Camellia sinensis plant. Depending on the processing method, it can be categorized into various types, including green, black, oolong, and white tea. Herbal teas, on the other hand, are infusions made from herbs, fruits, flowers, or spices and do not come from the Camellia sinensis plant.

  1. Benefits of Green Tea

Antioxidants: Green tea is rich in polyphenols, which are natural compounds with potent antioxidant properties. These antioxidants can neutralize harmful free radicals, potentially reducing oxidative stress and inflammation in the body.

Metabolism Boost: Green tea contains compounds, especially catechins like EGCG, that can enhance metabolic rate and promote fat burning. This can be particularly beneficial for those fasting for weight loss.

Appetite Regulation: Some studies suggest that green tea can help regulate appetite, potentially aiding those who might feel hungry during their fasting window.

Mental Clarity: The combination of caffeine and L theanine in green tea can improve brain function, promoting alertness, focus, and improved mood without causing the jitters that some people experience with coffee.

  1. Benefits of Herbal Teas

Variety and Flavor: Herbal teas come in a vast array of flavors and blends, offering a refreshing beverage choice during fasting without adding calories.

Digestive Support: Certain herbal teas, like peppermint and ginger, can aid digestion and soothe gastrointestinal discomfort.

Relaxation: Some herbal teas, such as chamomile and lavender, have natural calming effects, which can be beneficial during fasting, especially if one feels stressed or restless.

  1. Caffeine Content and Implications for Fasting

Sleep Disruption: Caffeine is a stimulant that can interfere with sleep patterns. Consuming caffeinated teas, especially in the afternoon or evening, can lead to difficulties falling asleep or staying asleep. Proper rest is crucial during fasting to support the body’s recovery and regeneration processes.

Dehydration: While tea is primarily water and can contribute to hydration, the diuretic effect of caffeine can lead to increased urination. It’s essential to ensure adequate water intake, especially when consuming caffeinated teas during fasting.

Individual Sensitivity: People have varying sensitivities to caffeine. Some might feel energized and alert after consuming tea, while others might feel jittery or anxious. It’s crucial to be aware of personal tolerance levels and adjust tea consumption accordingly.


Tea, whether green or herbal, can be a beneficial and enjoyable beverage choice during fasting. It offers a range of health benefits, from antioxidant properties to metabolic boosts. However, it’s essential to be mindful of the caffeine content in certain teas and consider individual sensitivities to ensure the fasting experience remains positive and effective.

Coconut Water

Coconut milk shake on tropical beach with palm trees and sea background

No, because of its sugar content. Coconut milk might be okay, depending on the brand.

Coconut water is the clear liquid found inside young green coconuts, while coconut milk is made by blending coconut meat with water. Both are popular beverages and ingredients in various cuisines, but their nutritional compositions differ significantly.

  1. Coconut Water

Natural Electrolytes: Coconut water is often touted as a natural sports drink due to its electrolyte content. It contains potassium, sodium, magnesium, and calcium, which can help replenish lost electrolytes, especially after physical activity.

Sugar Content: Despite its health benefits, coconut water contains naturally occurring sugars. Depending on the brand and the maturity of the coconut, it can have between 11 to 16 grams of sugar per serving. This sugar content can spike blood sugar and insulin levels, potentially disrupting the fasting state.

Vitamins and Minerals: Beyond electrolytes, coconut water is a source of several B vitamins, vitamin C, and various minerals. However, these nutrients are present in relatively small amounts.

  1. Coconut Milk

Fats: Coconut milk is rich in medium chain triglycerides (MCTs), a type of fat that the body can quickly use for energy. This can be beneficial for those on ketogenic diets or those looking for a quick energy source without spiking blood sugar.

Carbohydrate Content: The carbohydrate content in coconut milk can vary significantly depending on the brand and whether it’s full fat or light coconut milk. Some brands might have a minimal carbohydrate content, making them more suitable for fasting, while others might have higher levels.

Calories: Due to its fat content, coconut milk is calorie dense. For those fasting for weight loss, it’s essential to be aware of the caloric intake from coconut milk.

  1. Implications for Fasting

Blood Sugar and Insulin: One of the primary goals of fasting is to maintain low blood sugar and insulin levels. The sugars in coconut water can disrupt this, potentially taking the body out of the fasting state. Coconut milk, if chosen wisely with minimal carbs, might be less disruptive.

Nutrient Intake: While coconut water provides electrolytes and coconut milk offers beneficial fats, it’s essential to weigh these benefits against the potential drawbacks during fasting, especially if the goal is strict calorie or carbohydrate restriction.


While coconut water’s natural sugars make it less ideal during fasting, coconut milk might be a more suitable option, depending on its carbohydrate content and the individual’s fasting goals. As with any dietary choice during fasting, it’s essential to consider individual objectives, the specific product’s nutritional profile, and overall dietary intake.

Pre workout Powders

No, especially those with branched chain amino acids.

Pre workout powders are supplements designed to boost energy, endurance, and performance during exercise. They often contain a mix of ingredients, including caffeine, amino acids, vitamins, and other compounds that can enhance blood flow or muscle function.

  1. Branched Chain Amino Acids (BCAAs)

Composition: BCAAs consist of three essential amino acids: leucine, isoleucine, and valine. They play a crucial role in muscle protein synthesis and energy production during exercise.

Benefits: BCAAs can help reduce muscle fatigue, improve workout intensity, and support muscle recovery post exercise. They can also prevent muscle catabolism (breakdown) during prolonged workouts.

Implications for Fasting: Amino acids, including BCAAs, can stimulate insulin release. Insulin is an anabolic hormone that promotes nutrient storage and can counteract the catabolic state of fasting. Thus, consuming BCAAs during a fast can potentially disrupt the fasting state by triggering an insulin response.

  1. Other Ingredients in Pre workout Powders

Caffeine: A common ingredient in pre workout supplements, caffeine can boost energy, alertness, and performance. While it can enhance the benefits of fasting by promoting fat burning and increasing metabolic rate, excessive caffeine can lead to dehydration, jitters, or sleep disturbances.

Creatine, Beta Alanine, and Nitric Oxide Precursors: These ingredients can improve workout performance and endurance. However, they don’t significantly impact the fasting state as BCAAs might.

Sweeteners and Fillers: Many pre workout powders contain artificial sweeteners, colors, or other additives. While some sweeteners might not affect blood sugar, others can, potentially disrupting the benefits of fasting. It’s essential to read ingredient labels carefully.

  1. Timing and Fasting Goals

Workout Timing: If one’s workout is at the end of the fasting period, just before the first meal, the impact of the pre workout on the overall fasting benefits might be minimal. However, if taken in the middle of a fasting window, it could disrupt the fast more significantly.

Fasting Objectives: The decision to use pre workout powders during fasting should align with one’s fasting goals. If the primary aim is autophagy, cellular repair, or strict calorie/carbohydrate restriction, it might be best to avoid pre workout powders with BCAAs. If the goal is weight loss or improved exercise performance, and the fasting window is shorter, there might be more flexibility.


While pre workout powders can enhance exercise performance, those containing BCAAs might not be ideal during fasting due to their potential to stimulate insulin and disrupt the fasting state. It’s essential to consider individual goals, the specific ingredients in the pre workout supplement, and the timing of both the workout and supplement intake when practicing intermittent fasting.


People toasting over alcohol

Even if it’s labeled as keto friendly, it’s not recommended due to its effect on the liver.

Alcohol, regardless of its form, is metabolized differently than other macronutrients. When consumed, it takes priority in the metabolic process because the body recognizes it as a toxin and seeks to eliminate it as quickly as possible.

  1. Impact on the Liver

Metabolism: The liver is the primary organ responsible for metabolizing alcohol. When alcohol enters the liver, it’s converted into acetaldehyde, a toxic compound that the body then further breaks down and eliminates. This process requires significant liver resources and can be taxing, especially if the liver is already working hard during a fasting state to metabolize stored fats.

Fat Storage: Alcohol can interfere with the liver’s ability to produce glucose and regulate blood sugar. Moreover, when the liver is busy processing alcohol, it’s less efficient at metabolizing fat. This can slow down fat burning, counteracting one of the primary benefits of fasting.

Liver Health: Chronic alcohol consumption can lead to a range of liver issues, from fatty liver disease to cirrhosis. Even occasional drinking during fasting might amplify the stress on the liver, as the organ is already in an intensified state of fat metabolism.

  1. Other Implications of Alcohol During Fasting

Insulin Sensitivity: Alcohol can affect insulin sensitivity, potentially leading to blood sugar spikes and crashes. This can disrupt the metabolic advantages of fasting.

Dehydration: Alcohol acts as a diuretic, leading to increased urine production and potential dehydration. This effect can be exacerbated during fasting, where fluid balance is already crucial.

Judgment and Willpower: Alcohol can impair judgment and reduce inhibitions. This might make it harder to stick to fasting goals or lead to poor dietary choices when breaking the fast.

Empty Calories: Even if an alcoholic beverage is labeled as “keto friendly” because it’s low in carbs, it still provides empty calories that offer no nutritional value. Consuming these calories during a fasting window can negate the caloric deficit aimed for during fasting.

  1. “Keto Friendly” Alcohols

While some alcohols, like certain hard liquors, might not have carbs, they still have the aforementioned effects on metabolism and liver function. The term “keto friendly” often refers to the carbohydrate content, not necessarily the broader health implications of the beverage.


While intermittent fasting, it’s advisable to avoid alcohol, even if it’s labeled as keto friendly. The metabolic stress that alcohol places on the liver, combined with its other potential disruptions to the fasting state, can counteract the benefits one seeks to achieve through fasting. For those committed to their fasting regimen and overall health, it’s best to consume alcohol in moderation and outside of fasting windows, ensuring the body has ample time and resources to process and eliminate it.


Three glasses of milk with different amount

No, because of its high carb content. But milk derivatives like butter and cream are better.

Milk and its consumption during fasting has been a topic of debate in various dietary and religious circles. Fasting protocols, like intermittent fasting, often restrict caloric intake to promote weight loss or metabolic health, while religious fasts may have rules about what can be consumed.

Milk is a rich source of various nutrients including proteins, vitamins, minerals, and carbohydrates. The carbohydrates present in milk are primarily in the form of lactose. Lactose is a sugar, and consuming sugars can cause an insulin response in the body, potentially breaking a fast. Here’s a breakdown:

Carbohydrates: As mentioned, the carbohydrate content in milk is primarily from lactose. If the purpose of fasting is to minimize insulin spikes or to stay in a state of ketosis (as in ketogenic diets), then drinking milk can potentially disrupt this state because of its sugar content.

Protein: Milk is also a source of protein, which can also elicit an insulin response, albeit typically smaller than that from carbohydrates. This again can be a concern if the goal of the fast is to maintain very low insulin levels.

Milk Derivatives Butter and Cream:
Butter and cream are derived from milk but have different nutritional profiles.

Butter: It’s almost pure fat, with trace amounts of carbs and protein. Given its low protein and carb content, it’s less likely to disrupt a metabolic fast compared to milk. In fact, butter is a common ingredient in ‘Bulletproof Coffee’, a drink some people consume during fasting periods on ketogenic diets.

Cream: Cream, especially heavy cream, is high in fat and low in carbs compared to milk. It might have a smaller effect on insulin than milk, making it a preferred choice for some during fasting. However, it still contains some amount of lactose, so it’s not entirely carb free.

In Conclusion:
If the primary goal of fasting is to maintain low insulin levels, minimize caloric intake, or stay in a state of ketosis, milk might not be the best choice because of its carbohydrate content. However, milk derivatives like butter and cream, which have a higher fat content and much lower carb content, might be more acceptable. Always consult with a nutrition expert or medical professional to understand what’s best for your individual circumstances and health goals.


Yes, as long as they don’t have added sugars or harmful additives.

Electrolytes are essential minerals in the body that carry an electric charge, and they play a critical role in maintaining various physiological functions. Some of the main electrolytes include sodium, potassium, calcium, magnesium, phosphate, bicarbonate, and chloride. When fasting, especially for extended periods, the balance of these electrolytes can be affected, potentially leading to symptoms or complications.

Electrolytes During Fasting:

Importance of Electrolytes:

Maintaining Fluid Balance: Electrolytes help regulate the balance of fluids in and out of cells, tissues, and organs.
Nerve Signaling: They are crucial for transmitting electrical impulses along nerve cells.
Muscle Function: Electrolytes, especially calcium, potassium, and sodium, are vital for muscle contraction and relaxation.
Why Electrolyte Intake is Essential During Fasting:

Dehydration: During fasting, individuals often consume less fluid than usual, which can lead to dehydration. Dehydration can result in a loss of electrolytes.
Ketosis: Extended fasting or fasting combined with a low carb diet can push the body into ketosis, a state where it burns fat for energy. When the body is in ketosis, it excretes more sodium, which may necessitate additional sodium intake.
Avoiding Symptoms: Insufficient electrolyte levels during fasting can lead to symptoms such as dizziness, fatigue, headache, muscle cramps, and irregular heartbeat. Maintaining proper electrolyte balance can help avoid these issues.
Choosing the Right Electrolyte Solution:

Avoid Sugars: Some commercial electrolyte drinks contain added sugars, which can break the fast and stimulate an insulin response.

Harmful Additives: Some electrolyte supplements or solutions may contain additives, colors, or other ingredients that might not be conducive to the goals or health benefits of fasting.
Natural Sources: Natural sources of electrolytes such as broths or pinches of sea salt in water can be a better alternative during fasting. Additionally, some people use supplements like magnesium or potassium tablets to support electrolyte balance.

In Conclusion:
When engaging in fasting, especially for more extended periods or under strenuous conditions (like exercising while fasting), it’s crucial to ensure the body maintains its electrolyte balance. Using electrolyte solutions or supplements without added sugars or harmful additives is a recommended way to support the body’s needs and maintain the fasting state effectively. As always, it’s essential to consult with a healthcare professional when considering fasting or making significant dietary changes.

Fasting, especially when done for extended periods, can reduce the intake of certain essential nutrients. While fasting can offer numerous health benefits, from metabolic improvements to mental clarity, it’s crucial to ensure that the body’s nutrient needs are met. Here’s a more detailed exploration of the importance of supplementing with B vitamins, vitamin D, and omega 3 fatty acids during fasting:

B Vitamins:

Role in the Body: B vitamins, a group of eight water soluble vitamins, play vital roles in energy production, DNA synthesis, and maintaining healthy nerve functions.
Why Supplement During Fasting: Extended fasting can limit the intake of B vitamins, especially if one typically receives these vitamins from foods excluded during the fast. A deficiency can lead to fatigue, weakness, anemia, and nerve damage.
Sources: B vitamins are commonly found in whole grains, beans, peas, and lentils. Animal sources include meat, eggs, and dairy products. In the context of fasting, a B complex supplement can help meet the body’s requirements.

Vitamin D:

Role in the Body: Vitamin D is crucial for calcium absorption in the gut, which supports bone health. It also plays roles in immune system function and inflammation regulation.
Why Supplement During Fasting: Many people are already deficient in vitamin D, especially those living in northern latitudes or those who spend limited time outdoors. Fasting can further reduce the intake of this vitamin if dietary sources are restricted.
Sources: While sunlight is the primary source, vitamin D can also be found in fatty fish, fortified dairy, and egg yolks. In fasting scenarios, a vitamin D supplement can be beneficial.

Omega 3 Fatty Acids:

Role in the Body: Omega 3s are essential fats crucial for brain health, inflammation control, and heart health.
Why Supplement During Fasting: Given their importance for cognitive and cardiovascular health, it’s vital to maintain adequate omega 3 levels. Extended fasting can reduce the intake of these fats, especially if one’s regular diet includes fish or other sources.
Sources: Common dietary sources include fatty fish like salmon, walnuts, and flaxseeds. In the context of fasting, an omega 3 supplement, like fish oil or algal oil, can be taken.
Informed Choices During Fasting:


When deciding to fast, it’s essential to be informed and plan appropriately. While fasting can offer numerous health benefits, neglecting nutrient needs can counteract some of these benefits. Supplementing essential nutrients ensures that the body remains nourished, and the goals of fasting, whether they are weight loss, detoxification, spiritual, or metabolic health, are effectively met. Always consult with a healthcare or nutrition expert to tailor fasting and supplementation strategies to individual needs and health status.