Brenda Khan
Fasting is a popular dietary practice where people refrain from eating food or drinking beverages that contain calories for a certain period. There are many different types of fasting, such as time-restricted eating, alternate-day fasting, and the 5:2 diet, which allow for the consumption of certain foods and drinks. It is important to stay hydrated while fasting, and water is the ultimate fasting beverage as it contains zero calories and is vital for bodily functions. Other acceptable drinks during fasting include black coffee, herbal teas, and sugar-free electrolyte drinks. It is important to note that consuming any calories technically breaks a fast, so it is recommended to avoid drinks with sugar or artificial sweeteners. Additionally, some supplements and drinks may break a fast, so it is important to check the ingredients and nutritional information.
What to drink when fasting so you don't faint
| Characteristics | Values |
|---|---|
| Calories | Minimal or zero |
| Examples of drinks | Water, black coffee, herbal teas, sugar-free electrolyte drinks, sparkling water, diluted apple cider vinegar |
| Supplements | Avoid supplements with calories, sugar, protein, or fat |
| General tips | Listen to your body, keep busy, rest if you need to, keep a snack on hand in case you feel faint |
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What You'll Learn
Water is the ultimate fasting drink
Water fasting is claimed to have several health benefits, including weight loss, stress and inflammation reduction, and hormone modulation. Studies have also linked water fasting with a lower risk of certain cancers, heart disease, and diabetes. However, water fasting has many risks and can be very dangerous if followed for too long. Some people may feel weak or dizzy during a water fast and may want to avoid operating heavy machinery and driving to avoid accidents.
During a water fast, it is important to drink enough water to prevent dehydration. To avoid dehydration, one may need to drink more water than usual. Symptoms of dehydration include dizziness, nausea, headaches, constipation, low blood pressure, and low productivity. Orthostatic hypotension, a drop in blood pressure that happens when one suddenly stands up, can leave one dizzy, lightheaded, and at risk of fainting. If one experiences orthostatic hypotension while fasting, they may need to avoid driving or operating heavy machinery.
Water is the best drink to consume during fasting because it does not break a fast. Technically speaking, eating or drinking any calories breaks a fast. Water contains zero calories and does not break a fast, so a person can drink as much of it as they wish during fasting periods.
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Black coffee is acceptable
When fasting, it is important to stay hydrated, and drinking black coffee can be a great way to do this. Coffee is typically prohibited before metabolic assessments in clinical and research settings, but research has shown that drinking black coffee does not affect fasting metabolic markers.
Black coffee contains very few calories and is therefore acceptable to drink while fasting. However, it is important to avoid adding any milk, sugar, or other high-calorie additives, as these can break your fast. If you must add something, consider a teaspoon of heavy cream or coconut oil, as these are unlikely to significantly alter your blood sugar levels or total calorie intake.
Drinking black coffee during a fast can have several benefits. Coffee can suppress your appetite, making it easier to stick to your fast. It can also increase your metabolic rate and fat oxidation, and the caffeine can stimulate the nervous system, promoting the release of adrenaline and encouraging metabolism. Coffee can also help to improve mental focus and alertness, which can be beneficial when you are low on energy during the day.
However, it is important to be mindful of your coffee intake. Drinking coffee right after waking up can affect your circadian cortisol peak in the morning, and high amounts of coffee may interfere with your sleep. It is always better to abstain from drinking any type of stimulant, natural or otherwise.
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Tea is fine, but avoid milk and sugar
Drinking tea while fasting is generally considered fine, as long as it is herbal tea or black tea without any additives such as milk, cream, milk alternatives, sugar, or honey. Zero-calorie sugar substitutes are fine.
Tea can be a great way to enhance your fasting experience. It can help you stay hydrated, suppress your appetite, and provide a feeling of fullness. It can also improve your mental clarity and boost your metabolism. Green tea, oolong tea, and earthy-flavored teas like pu-erh and hojicha can help you feel fuller for longer. Peppermint tea and ginger tea are particularly effective in reducing cravings and aiding digestion.
However, it's important to note that the answer to whether you can drink tea during a fast depends on the type of fast you are following. Some intermittent fasting methods allow for the consumption of beverages like water, herbal teas, and black coffee without additives during the fasting window. On the other hand, strict fasts may prohibit any caloric intake, including tea.
If you are considering embarking on an intermittent fasting program, it is always recommended to consult with a physician or a healthcare professional to ensure that it is safe for you and to understand the guidelines and principles of your chosen fasting method.
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Electrolyte drinks are good, but check for sugar
Fasting involves the removal of some or all food and drink for a period of time. During a fast, it is important to keep your calorie intake low to allow your body to enter a fasted state. Choosing drinks that won't spike insulin is key.
Water is the ultimate fasting beverage. It is calorie-free and vital for bodily functions. However, it is important to stay hydrated with other drinks as well. Electrolyte drinks are a good option, as they maintain fluid balance. However, it is important to choose sugar-free options, as sugar can break a fast.
Some people may also choose to drink black coffee and herbal teas during a fast, as these contain very few calories. It is important to avoid artificial sweeteners, as they can affect your blood sugar levels and disrupt your gut health.
If you are feeling faint during a fast, it is important to stop fasting straight away and seek medical help. To keep yourself safe, it is recommended to limit your fast periods to 24 hours or fewer and keep a snack on hand in case you start to feel faint or ill.
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Avoid diet drinks and artificial sweeteners
When fasting, it is recommended to avoid diet drinks and artificial sweeteners. This is because artificial sweeteners can affect your blood sugar levels and insulin resistance, which is counterintuitive to the purpose of fasting.
Artificial sweeteners are zero-calorie food additives that have a sweet taste similar to sugar. While they do not get metabolized for energy, studies indicate that their habitual use can alter the gut microbiota and have negative impacts on glucose metabolism. For example, sucralose (Splenda) and aspartame (Equal) do not cause a significant glucose or insulin response after a single dose, but prolonged consumption can result in a change in the gut microbiome and decreased insulin resistance. Aspartame is made up of amino acids and is metabolized to phenylalanine, aspartic acid, and methanol in the GI tract. Phenylalanine, an essential amino acid, stimulates mTOR and inhibits autophagy, which breaks a fast if longevity is the goal.
In addition, individual sensitivities to artificial sweeteners should be considered. Some people find saccharin (Sweet'N Low) triggers hunger cravings or digestive issues, impacting their fasting experience and goals. If your primary focus is weight loss, small amounts of saccharin might be acceptable. However, if you prioritize other benefits like autophagy or maximizing ketosis, avoiding Sweet 'N Low might be preferable.
Overall, while some artificial sweeteners may be technically allowed during a fast due to their zero-calorie content, it is generally recommended to avoid them due to their potential impact on blood sugar levels and insulin resistance.
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Frequently asked questions
Water, black coffee, and herbal tea are widely considered to be acceptable drinks during fasting. Some people also consume diluted apple cider vinegar, sugar-free electrolyte drinks, and bone broth, but these may have a slight impact on your fast.
Any drink that contains calories will technically break a fast. This includes drinks with sugar, protein, and fat, such as soda, protein powder, and coconut oil.
Most people aim to drink at least 8 cups (2 liters) of water during a fast, but you should listen to your body and drink according to your thirst.
Fasting can be dangerous if not done properly. Some risks include feeling faint, hungry, unfocused, bloated, and tired. Fasting for too long can lead to more severe symptoms such as muscle cramps, confusion, seizures, and even death.
To avoid feeling faint, you can try limiting your fast to 24 hours or keeping a snack on hand. You may also want to ease out of your fast by introducing small portions of easily digestible foods, such as nutrient-dense smoothies.
