Does Coffee Break A Fast? A Guide on Coffee While Fasting

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So, is it okay to drink coffee while fasting? Does Coffee break a fast?

To answer: depends on the coffee.

Black coffee can seriously boost your metabolism since it accelerates fat breakdown. Black coffee shots are common in fitness centers before workouts because it ensures that more calories are burnt, and energy is boosted. That reminds us, you can find out how to work out while fasting and achieve maximum results right here

Some people drink coffee during the morning to suppress hunger pangs on a particularly starving day. But there is a catch to all this. 

The more additives you have, the more you risk breaking your fast. Does coffee break a fast? lets find out!

Can You Drink Coffee While Fasting? Does coffee break a fast?

What is acceptable in your coffee? Zero calories and nothing more.

The United States Department of Agriculture states that a cup of plain sugarless black coffee will contain only 3 calories. But if you choose to add sugar, cream, milk, honey, and other ingredients, your calorie count may go up to as much as 40-50 calories. 

That’s where the trouble lies. 

Intermittent fasting works by breaking down stored up fats in your body to use as energy since you are not feeding it anything. That won’t work if you’re sipping on white chocolate frappe from Starbucks.

But what about other types of coffee? 

Can I Drink Intermittent Fasting Coffee With Cream or Milk?

The simple answer to this would be No. While plain black coffee might be a boon during intermittent fasting due to its energy-boosting properties, adding milk can actually spike your blood sugar levels. 

The goal of intermittent fasting is to make your body find its energy from the stored fat and not calories coming from carbs. A tablespoon of coffee creamer is around 20 calories, milk – 6 calories. Normally people use at least a few tablespoons of creamer or milk in their coffee. Thus calories are quickly adding up and breaking your fast.

If you really must add something to your black coffee, I would suggest alternatives like almond milk. It has as little as 2 calories per tablespoon and for unsweetened options, the sugar count is zero. So if a splash of almond milk would help you go through tough fasting hours, you can add it to your cup of coffee.

does coffee break a fast

Does Bulletproof Coffee Break A Fast?

Bulletproof coffee or butter coffee contains high-quality beans, unsalted butter, coconut oil, or any oil with medium-chain-triglyceride (MCT). It was invented to replace sugary and high-calorie breakfast meals and keep you satiated throughout the first few hours at your desk.

The Bulletproof Diet recommends adding ghee or grass-fed butter along with the coffee beans and MCT. That’s problematic because ghee has roughly 100-120 calories per tablespoon. Meaning, all those calories will end up breaking your fast. 

The upside is that ghee is pure fat.

Why would that be considered a plus?

We have to look at how ketosis works. Normally your body uses glucose coming from carbohydrates as fuel. When there are not enough carbohydrates to burn for energy the body enters a stage called Ketosis. During Ketosis you start burning stored fat for energy. This means that consuming fats won’t interfere with ketosis a.k.a your body’s fat-burning stage.

In short, consuming bulletproof coffee will certainly break your fast. But you can drink it if you are practicing Keto diet and not following a strict fasting regime.

Though, remember that Bulletproof Coffee still contains a lot of calories. Essentially, the fastest way to reach ketosis is still limiting the calorie intake and following a strict fasting schedule. Does coffee break a fast if bulletproof? Yes it absolutely does.

What Can I Add To My Coffee While Fasting?​

While we have ruled out most combinations like intermittent fasting and coffee creamer, some ingredients are acceptable in your cup of coffee.

A sprinkle of cinnamon or nutmeg powder might enhance your taste while keeping your fast intact. Low-calorie, natural sweeteners like stevia and a touch of cocoa powder are also okay.   

Other Coffee and Fasting Tips

Does coffee break a fast if black? No.

But black coffee might not be the beverage to start drinking for its benefits during fasting if you’re a decaf or tea person. Your body may not be accustomed to such high caffeine intake, which might cause gastrointestinal problems and headaches. We recommend you start drinking in moderation first until you slowly develop the taste buds for it. 

Never drink more than the recommended amount. Healthy adults can have up to 400mg of caffeine, so roughly 2 – 2.5 cups of brewed coffee are okay.  

Use your black coffee energy for a powerful workout during intermittent fasting. Especially if your aim is losing weight, it makes sense to slowly start adding workouts to your fasting routine. Coffee can help kickstart that routine. 

Incorporate it into your meal plan. Do you want to start fasting but don’t know what to eat at the slated time? Consider incorporating coffee and other drinks like a smoothie in your fasting meal plan

In Conclusion

Here’s what I can say about coffee and fasting in the end: Does coffee break a fast? Not if it’s plain black coffee.

Can bulletproof coffee or coffee with a creamer break a fast? Definitely. 

Bulletproof coffee may work for some sticking to the Keto diet. But will drinking it like a magic potion without doing anything else help you lose weight? Certainly not. In fact, it might add to your fat and calorie build-up. But if you’re looking to replace breakfast or your first meal with bulletproof coffee, it can be incorporated into your fasting routine.

Black coffee can work hand in hand with your fasting thanks to its energy boost and calorie-burning qualities. But is it necessary to dunk coffee shots to get the best out of your fasting experience? Not necessarily. Many people find matcha tea or lime water helps them out more during those hunger pangs. For the full range of beverages that you can and cannot have, check out this page

All in all, now you know how coffee can make or break your fast. So, get started with your 21-day Intermittent Fasting challenge today! 

More on Intermittent Fasting


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Information on this document and our website is for educational and informational purposes only. You should not rely on this information as a substitute, nor does it replace professional medical advice, diagnosis, or treatment.

If you have any concerns or questions about your health, you should always consult with a dietitian, physician or another health-care professional. Consult your physician before starting intermittent fasting, especially if you are pregnant, breastfeeding, have any medical condition, or are taking any medication. Read more here.