What should I drink during fasting? You can drink water, black coffee, plain tea, and zero-calorie drinks during your fasting window without breaking your fast. These drinks contain no calories and keep your body in a fasted state while helping you stay hydrated.
Will water break my fast?
Water never breaks your fast. Your body needs water to survive, and drinking it during fasting keeps you hydrated without adding any calories. Plain water has zero calories, zero sugar, and zero protein, so it cannot trigger an insulin response or stop the fat-burning process.
Studies show that drinking water during fasting can boost your metabolism by up to 30% for about an hour. When you drink 500ml of water, your body burns more calories just heating it up to body temperature. Water also fills your stomach and reduces hunger pangs during longer fasting periods.
You should drink between 2 to 3 litres of water each day during fasting. Your body loses water through breathing, sweating, and going to the bathroom, so you need to replace it constantly. Dark yellow urine means you need more water, while light yellow or clear urine shows good hydration.
Does black coffee break a fast?
Black coffee does not break your fast. A cup of black coffee contains only 2 to 5 calories, which is too small to stop autophagy or fat burning. The caffeine in coffee can actually help your fast by reducing hunger and boosting fat breakdown.
Research shows that coffee increases fat burning by up to 29% in lean people and 10% in people with obesity. The caffeine pushes your body to use stored fat for energy instead of glucose. Coffee also contains antioxidants that protect your cells during fasting.
Drink your coffee black without any additions. One tablespoon of cream adds 52 calories and stops your fast. One tablespoon of sugar adds 49 calories and spikes your insulin. One tablespoon of butter adds 102 calories and breaks your fast. Skip all additions and drink it plain.
Can I drink tea while fasting?
Tea keeps your fast intact as long as you drink it plain. Green tea, black tea, white tea, and herbal teas all contain zero to 2 calories per cup. These drinks hydrate you and provide antioxidants without breaking your fasted state.
Green tea contains compounds called catechins that boost fat burning during fasting. One study found that green tea extract increased fat burning by 17% during exercise. The tea also contains a small amount of caffeine that reduces hunger and gives you energy.
Herbal teas like peppermint, chamomile, and ginger tea work great during fasting. They have no calories and can settle your stomach if you feel hungry. Ginger tea helps reduce nausea that some people feel when fasting. Peppermint tea calms your digestive system and freshens your breath.
Never add milk, sugar, honey, or artificial sweeteners to your tea during fasting. Even a splash of milk adds calories and protein that can stop autophagy. Stevia and other artificial sweeteners might not contain calories, but research shows they can still trigger an insulin response in some people.
Will diet drinks break my fast?
Diet sodas and zero-calorie drinks sit in a grey area for fasting. They contain no calories, but the artificial sweeteners can trigger an insulin response in some people. This insulin spike can slow down fat burning and reduce some fasting benefits.
Studies show mixed results on artificial sweeteners during fasting. Some research finds that sweeteners like aspartame and sucralose cause small insulin increases even without calories. Other studies show no effect on insulin or blood sugar. Your body might react differently than someone else’s body.
The safest approach is to skip diet drinks during your fasting window. Stick to water, black coffee, and plain tea for the cleanest fast. Save your diet sodas for your eating window if you want them. This way you get all the benefits of fasting without any risk of breaking it.
If you must have something sweet during fasting, sparkling water with natural flavours is your best choice. These drinks contain zero calories and no sweeteners. Brands make them by adding fruit essences to carbonated water, which gives flavour without any additives.
Does bone broth break a fast?
Bone broth breaks a true fast because it contains calories, protein, and fat. One cup of bone broth has between 30 to 50 calories, 6 grams of protein, and 2 grams of fat. These nutrients trigger digestion and stop autophagy.
Some people drink bone broth during extended fasts that last 24 hours or more. They call it a “broth fast” or “modified fast.” The small amount of nutrition helps them feel better during long fasting periods while keeping calories very low. This approach works for some people but does interrupt pure fasting.
For standard intermittent fasting where you fast for 16 hours and eat for 8 hours, skip the bone broth during your fasting window. Save it for when you break your fast or drink it during your eating window. The protein in bone broth will pull you out of your fasted state.
Can I drink apple cider vinegar during fasting?
Apple cider vinegar in water does not break your fast. One tablespoon of apple cider vinegar contains only 3 calories, which is too small to stop fat burning or autophagy. Mix 1 to 2 tablespoons in a large glass of water and drink it during your fasting window.
Research shows that apple cider vinegar can help control blood sugar and reduce hunger. One study found that people who drank apple cider vinegar with a high-carb meal had 55% lower blood sugar spikes after eating. The vinegar slows down how fast your stomach empties food.
The acetic acid in apple cider vinegar can damage your tooth enamel if you drink it straight. Always dilute it in at least 250ml of water. Drink it through a straw to protect your teeth. Rinse your mouth with plain water after drinking it.
Some people find that apple cider vinegar reduces their appetite during fasting. Others feel that it upsets their stomach when taken on an empty stomach. Try it once and see how your body reacts before making it a daily habit.
What drinks should I avoid during fasting?
Skip any drink that contains calories, sugar, protein, or fat during your fasting window. These nutrients trigger insulin release and digestion, which stops your fast.
Drinks that break your fast:
1. Regular soda (150 calories per can)
2. Fruit juice (110 calories per cup)
3. Milk (150 calories per cup)
4. Protein shakes (120 to 400 calories per shake)
5. Smoothies (200 to 500 calories per smoothie)
6. Alcohol (100 to 300 calories per drink)
7. Sports drinks (80 calories per bottle)
8. Coconut water (45 calories per cup)
9. Almond milk (30 to 90 calories per cup)
10. Lemon water with honey (64 calories per tablespoon of honey)
Even drinks that seem healthy can break your fast. A green juice might contain vitamins but it also has 120 calories from fruit sugar. A tablespoon of collagen powder adds 35 calories of pure protein. These small amounts still trigger your digestive system.
Alcohol deserves special mention because it breaks your fast and can cause problems. Your body treats alcohol as a toxin and stops burning fat to deal with removing the alcohol first. Drinking on an empty stomach also hits you harder and faster than drinking with food.
How much should I drink during fasting?
Drink at least 2 to 3 litres of water and other zero-calorie drinks during your fasting period. Your body needs more fluids when fasting because you do not get water from food. About 20% of your daily water intake comes from the food you eat, so you need to replace that with extra drinks.
Listen to your thirst signals and drink when you feel thirsty. Your body tells you when it needs water. Some people need more fluids because they exercise, live in hot climates, or have larger bodies. A person who weighs 90kg needs more water than someone who weighs 60kg.
Spread your drinks throughout the fasting window instead of drinking everything at once. Sipping water and coffee throughout the morning and afternoon keeps you hydrated and helps reduce hunger. Drinking 2 litres in one hour will just make you run to the bathroom constantly.
Signs you need more fluids during fasting:
1. Dark yellow urine
2. Dry mouth and lips
3. Headaches
4. Dizziness when standing up
5. Feeling tired or weak
6. Difficulty concentrating
Does lemon water break a fast?
A squeeze of fresh lemon in water does not break your fast. Half a lemon contains only 8 calories, which is too small to stop autophagy or fat burning. The tiny amount of vitamin C and antioxidants in lemon can actually help your fast.
Lemon water helps some people drink more fluids because plain water gets boring. The citrus flavour makes water more interesting without adding meaningful calories. Some research suggests that the polyphenols in lemon might boost fat burning, though studies on this are limited.
Keep your lemon water to half a lemon or less per glass. Squeezing a whole lemon or adding multiple lemons throughout the day starts adding up in calories. Some people also add lemon essential oil to water, but this is not the same as fresh lemon and might contain additives.
Never add sugar, honey, maple syrup, or agave to your lemon water during fasting. These sweeteners all contain calories and will break your fast. Even though lemon water with honey tastes good and helps sore throats, save it for your eating window.
Can I drink electrolytes while fasting?
Electrolyte drinks without sugar or calories are safe during fasting. Pure electrolyte powders that contain only sodium, potassium, and magnesium have zero calories and keep you hydrated. These minerals help prevent headaches, muscle cramps, and fatigue during longer fasts.
Your body needs electrolytes to function properly. When you fast, you lose electrolytes through urine and sweat without replacing them through food. Low electrolytes cause the “fasting flu” symptoms like headaches, tiredness, and brain fog that some people get when they start fasting.
Add a pinch of sea salt to your water during fasting to replace sodium. Sea salt contains trace minerals that table salt lacks. You can also buy electrolyte powders that mix into water, but check the label first. Many electrolyte drinks contain sugar, artificial sweeteners, or flavourings that might break your fast.
Make your own electrolyte drink by mixing:
– 2 litres of water
– 1/2 teaspoon of sea salt
– 1/4 teaspoon of salt-free potassium salt
– Juice from half a lemon (optional)
This homemade version costs almost nothing and contains only the electrolytes you need. Commercial electrolyte drinks can cost $3 to $5 per bottle, while making your own costs about 20 cents per batch.
Frequently Asked Questions
Does sparkling water break a fast?
Sparkling water does not break your fast. It contains zero calories and is just carbonated plain water. The bubbles might make you feel more full, which can help reduce hunger during fasting.
Can I drink coffee with MCT oil during fasting?
MCT oil breaks your fast because it contains 130 calories per tablespoon. Even though MCT oil is fat and does not spike insulin much, it still provides calories that stop autophagy. Save MCT oil for your eating window.
Will drinking too much water break my fast?
You cannot break your fast by drinking water. Water has no calories and does not trigger insulin or digestion. Drink as much as you need to stay hydrated.
Does green tea have caffeine?
Green tea contains 25 to 50mg of caffeine per cup, which is about one-third the amount in coffee. This small amount gives you energy without making you jittery like coffee might.
Can I drink alcohol during my eating window?
You can drink alcohol during your eating window, but it slows down fat loss. Your body burns the alcohol before burning fat or food. Alcohol also makes you hungry and lowers your self-control around food.
What should I drink to break my fast?
Break your fast with water or herbal tea first. Wait 15 to 30 minutes, then eat a small meal with protein and healthy fats. This gentle approach helps your digestive system wake up after fasting.
Does chewing gum break a fast?
Most chewing gum breaks your fast because it contains sugar or artificial sweeteners. Sugar-free gum has 5 to 10 calories per piece, and the sweeteners might trigger insulin. Skip gum during fasting.
Can I drink kombucha while fasting?
Kombucha breaks your fast because it contains 30 to 50 calories per cup from sugar and probiotics. The fermentation process leaves some sugar behind. Drink kombucha during your eating window instead.
How do I stop feeling hungry during fasting?
Drink black coffee or green tea when hunger hits. The caffeine reduces appetite signals in your brain. Sparkling water also helps because the bubbles fill your stomach. Hunger usually passes after 15 to 20 minutes.
What should I drink during a 24-hour fast?
Stick to water, black coffee, and plain tea during a 24-hour fast. Add electrolytes to your water after 18 hours to prevent headaches and fatigue. Drink at least 3 litres of fluids throughout the day.
