13 Best Zero-Calorie Foods And Drinks For Intermittent Fasting — Feel Energised And Rejuvenated While You Fast!

Intermittent fasting is the talk of the town. You hear about it from friends and see it online, and everyone is talking about these incredible outcomes. It makes you wonder, doesn't it? Can skipping meals actually accomplish all of that? "Okay, but what can I actually have during those fasting hours?" is the next thing that comes to mind. That's when you hear whispers about "zero-calorie foods." 
 

Now, hold up. If you're thinking you're gonna find something with literally zero calories, well, science doesn't work that way. See, even a tiny bit of food has some energy in it. But here's the thing: we're talking foods so ridiculously low in calories that your body barely notices them. Think of it like this: if you're trying to empty a bucket with a tiny teaspoon, it's gonna take forever. 
 

Those "zero-calorie" foods are like that teaspoon. They're so insignificant; they won't mess with your fast. So, yeah, you can have them and still reap the benefits of intermittent fasting. In this blog, we're gonna spill the beans on these so-called zero-calorie foods for intermittent fasting, the ones that'll keep you feeling energised and rejuvenated while you fast.
 

Table Of Contents 

1. Is There Any Food I Can Eat While Fasting?
2. What Food Has Zero Calories For Fasting? 13 Best Zero-Calorie Foods And Drinks For Intermittent Fasting 
3. Which Meal To Skip When Fasting?
4. What Is The Minimum Calories For Fasting?
5. The Final Say
6. FAQs
7. References
    

Is There Any Food I Can Eat While Fasting?

Yes, some low-calorie foods and beverages can be consumed during intermittent fasting without disrupting the fasting state. Foods like cucumbers, celery, and lettuce provide hydration and fibre while keeping insulin levels stable. Additionally, drinks like herbal tea, black coffee, and green tea contain bioactive compounds that support metabolism and fat burning. However, it’s essential to avoid ultra-processed foods and anything high in sugar, as these can break your fast.
 

If you are tempted to eat, restrict yourself to water, electrolyte-rich drinks, and low-calorie, high-fibre vegetables to maximise the benefit of fasting. These options ensure that your body remains in a fasting state while preventing extreme hunger or weakness.
 

To reap the benefits of IF, join ToneOp Fit's Intermittent Fasting Plan for Weight Loss. Get personalised coaching, adaptable fasting windows, and strategies to manage cravings and prevent discomfort. Enjoy 24/7 dietitian support and lose fat efficiently while still enjoying your favorite foods. Achieve lasting results with our scientific, safe, and effective approach.
 

Also Read: 7-Day Intermittent Fasting Diet Plan: Steps, What To Eat and Benefits 
 

What Food Has Zero Calories For Fasting? 13 Best Zero-Calorie Foods And Drinks For Intermittent Fasting 

To give you a brief intro for intermittent fasting — it is basically an eating pattern where you cycle between eating and fasting. During fasting windows, consuming zero-calorie foods for intermittent fasting can help curb hunger while maintaining the fasting state. 
 

Here are 13 zero-calorie foods and drinks that support IF without adding calories.
 

1. Celery

Celery is one of the best zero-calorie foods for intermittent fasting, containing just 6 calories per 100 grams. It is rich in fibre, which helps you feel full longer, preventing hunger pangs. The high water content (about 95%) keeps you hydrated during fasting hours. Celery also contains apigenin, a flavonoid with anti-inflammatory and antioxidant properties that support digestion and reduce oxidative stress. Its crunchiness can also help satisfy the urge to chew without breaking the fast.
 

2. Lettuce

Lettuce is another excellent zero-calorie food for intermittent fasting, with only 5 calories per 100 grams. It is packed with vitamins A, C, and K, which help maintain skin health and immunity. The high fibre and water content in lettuce promote digestion and hydration, preventing bloating and constipation. It also contains lactucarium, a compound known for its mild sedative effects, which may help improve sleep quality during fasting periods.
 

3. Cucumber

Cucumbers are hydrating and refreshing, containing just 15 calories per 100 grams. They are composed of about 96% water, making them perfect for maintaining hydration during fasting. Cucumbers also contain flavonoids and tannins, which help reduce inflammation and protect against cell damage. Their fibre content aids in digestion and prevents overeating after breaking the fast.
 

4. Tomato

Tomatoes are nutrient-rich and contain about 18 calories per 100 grams. They are an excellent zero-calorie food for intermittent fasting because they are high in lycopene, a powerful antioxidant food that reduces inflammation in the body and supports heart health. Tomatoes also contain fibre, vitamin C, and potassium, which enhance digestion and hydration, making them an ideal addition to any IF plan.
 

5. Cauliflower

Cauliflower is a cruciferous vegetable with just 25 calories per 100 grams. It is loaded with fibre and water, making it highly satiating during fasting hours. The sulforaphane in cauliflower is a potent antioxidant that helps detoxify the body and support cellular health. Additionally, it aids in digestion and gut health, ensuring smoother digestion post-fasting.

 

6. Bell Pepper

Bell peppers contain about 31 calories per 100 grams and are rich in vitamin C and antioxidants. Their high water and fibre content make them an excellent zero-calorie food for intermittent fasting, helping to control appetite and enhance digestion. Capsanthin, the primary compound in red bell peppers, provides anti-inflammatory benefits and supports fat metabolism, making them beneficial for weight loss.
 

7. Zucchini

Zucchini is another low-calorie food, with only 17 calories per 100 grams. It has a high water content (over 90%) and is rich in fibre, keeping you full and hydrated during fasting hours. The presence of lutein and zeaxanthin in zucchini helps protect eye health and combat oxidative stress. Additionally, its mild taste makes it a versatile ingredient for fasting-friendly meals.
 

8. Radish

Radishes contain just 16 calories per 100 grams, making them a fantastic zero-calorie food for intermittent fasting. They are rich in anthocyanins and sulfur-containing compounds like glucosinolates, which support liver detoxification and reduce inflammation. Their peppery flavor stimulates digestion and metabolism while keeping the fasting state intact.
 

9. Carrot

Carrots have approximately 41 calories per 100 grams and are a good source of fibre, which helps regulate appetite and prevent post-fast overeating. They contain beta-carotene, a precursor to vitamin A, which supports skin health and immune function. The natural sweetness of carrots can also help curb cravings during fasting without disrupting ketosis or blood sugar balance.
 

10. Water

Water has zero calories and is the most essential component of intermittent fasting. It helps flush out toxins, improves digestion, and maintains electrolyte balance. Drinking enough water during fasting supports metabolic functions, prevents dehydration, and keeps hunger pangs at bay. Hydrogen and oxygen molecules in water are crucial for cellular hydration and energy production.
 

Also Read: Unpacking the Link Between Hydration & Immune System Health 
 

11. Herbal Tea

Herbal teas like chamomile, peppermint, and ginger tea contain zero calories and support digestion and relaxation during fasting. These teas contain polyphenols and flavonoids, which have antioxidant and anti-inflammatory properties. Herbal teas also aid in reducing bloating, improving gut health, and maintaining hydration, making them one of the best zero-calorie foods for intermittent fasting.
 

12. Black Coffee

Black coffee is a popular choice during intermittent fasting because it contains zero calories while providing an energy boost. The caffeine in coffee helps suppress appetite, enhances fat metabolism, and improves focus. It also contains chlorogenic acids, which have antioxidant properties and may aid in weight management. Drinking black coffee in moderation can enhance fasting benefits without breaking the fast.
 

13. Green Tea

Green tea is another powerful zero-calorie food for intermittent fasting, packed with catechins and antioxidants. It contains about 2 calories per 100 ml but is still considered negligible for fasting. The presence of epigallocatechin gallate (EGCG) in green tea boosts metabolism, enhances fat oxidation, and supports brain function. It also helps reduce hunger and maintain energy levels throughout the fasting window.
 

Also Read: What Can You Eat While Intermittent Fasting? Check Out This Detailed Dietary Guide For Maximum Weight Loss Benefits! 
 

Which Meal To Skip When Fasting?

The best meal to skip depends on your lifestyle and energy needs. Many people prefer skipping breakfast (16:8 fasting) as it aligns with the natural overnight fasting period and supports fat-burning. Others skip dinner if they find that eating earlier in the day improves digestion and sleep quality. Choose the meal that fits your schedule and allows you to maintain a sustainable fasting routine.
 

Also Read: 11 Popular Types of Diet for Weight Loss and 7-Day Diet Plan 
 

What Is The Minimum Calories For Fasting?

For true fasting, calorie intake should remain close to zero. However, some fasting protocols allow up to 50 calories without breaking the fast. This includes herbal teas, lemon water, and very small portions of low-calorie foods. To maintain the metabolic benefits of fasting, it’s best to avoid consuming any significant calories.
 

Also Read: Intermittent Fasting VS Fasting Know Methods & More | ToneOp 
 

The Final Say 

So, yeah, while "zero-calorie foods for intermittent fasting" might be a bit of a fib, these foods are your fasting buddies. They're like the tiny sips that keep you going without throwing you off track. Think of them as your secret weapon, a way to keep your energy up and your fast on point. And hey, a little bit of help goes a long way, right? So, next time you're feeling a bit peckish during your fast, remember these little lifesavers. They're here to help you feel good and keep you on that fasting journey.
 

FAQs

1. Which food is lowest in calories?

Celery is often cited as one of the lowest-calorie foods, primarily consisting of water and fibre. Other very low-calorie options include lettuce, cucumbers, and radishes.
 

2. How to lose 2kg in a week with intermittent fasting?

Losing 2kg in a week is generally considered rapid weight loss and may not be healthy for everyone. It would require a large calorie deficit, that could be achieved with intermittent fasting, when combined with a very low calorie diet. Consult a healthcare professional before attempting such a rapid weight loss strategy.
 

3. Will 1 calorie ruin a fast?

Technically, any calorie intake breaks a strict fast, but a single calorie is unlikely to significantly impact the metabolic benefits of intermittent fasting. However, consistent small calorie intakes can hinder the fasting process.
 

4. What not to eat during intermittent fasting?

During fasting periods, avoid any calorie-containing foods or beverages. This includes sugary drinks, solid foods, and high-fat items. Stick to water, unsweetened tea, and black coffee.
 

5. Which fruit is lowest in calories?

Watermelon is among the lowest-calorie fruits, primarily due to its high water content.   

Berries, such as strawberries and cranberries, are also relatively low in calories.   
 

6. Are there any negative-calorie foods?

There are no scientifically proven "negative-calorie" foods. While some foods like celery require energy to digest, the calorie burn is minimal and doesn't result in a net calorie loss.
 

References 

• https://fastic.com/en/blog/zero-calorie-foods-for-intermittent-fasting 
• https://www.youtube.com/watch?v=1_fSurvDrFQ 
   

About ToneOp

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