Fasting, particularly intermittent fasting, has become a popular approach for improving health and achieving weight loss.
A common question many ask is: Can I drink coffee while fasting? The good news is, in most cases, coffee—especially black coffee—is fasting-friendly.
However, the answer can depend on how you prepare your coffee and your fasting objectives. This guide dives into whether coffee aligns with fasting and how it can impact your overall goals.

Many individuals depend on their morning coffee to start the day, raising concerns about whether it disrupts the fasting process. While coffee may technically break a fast, its practical impact is often negligible for those committed to a fasting lifestyle.
Intermittent fasting involves cycling between eating and fasting periods, and it’s well-known for its potential benefits, such as weight loss and reduced risks of chronic conditions like heart disease, diabetes, and Alzheimer’s.
But what role does coffee play in all of this? Let’s explore how coffee fits into your fasting routine and whether it could enhance or hinder your progress. If you’ve ever wondered whether your morning brew breaks your fast, this article has the answers.
Can You Drink Coffee While Doing Intermittent Fasting?
Yes, you can! Black coffee won’t break your fast, making it a perfect beverage choice during fasting. However, adding sugar, cream, or milk can disrupt the fasting state.
Coffee drinkers may benefit from including black coffee in their fasting routine, as it can improve mental alertness, reduce fatigue, and potentially lower the risk of serious health conditions. Let’s explore the interaction between coffee and fasting in more detail.
Black Coffee Won’t Break Your Fast
One of the main concerns during fasting is whether a beverage disrupts the metabolic state. Fortunately, black coffee contains very few calories and does not trigger insulin production, keeping your body in a fasted state.
Drinking black coffee during fasting can:
- Help curb hunger, making fasting easier to maintain.
- Enhance focus and energy levels without compromising fasting benefits.
This is because black coffee contains almost no calories and won’t interfere with the processes that occur during fasting. It’s a great way to maintain energy levels while staying in a fasted state. For a convenient brewing option during fasting, try our drip filter coffee bags.
Coffee May Bolster the Benefits of Fasting
Research suggests that coffee not only fits into a fasting routine but might also enhance its benefits. Here’s how:

Moderate coffee intake can enhance the benefits of fasting by potentially improving metabolic effects and supporting longevity.
Metabolic Benefits
- Improved Fat Burning: Coffee boosts metabolism and promotes fat oxidation, which can help promote weight loss, complementing the effects of intermittent fasting.
- Stabilised Blood Sugar: Black coffee helps regulate blood sugar levels, reducing insulin spikes and supporting metabolic health.
Fasting combined with coffee may create a synergistic effect, especially for those looking to burn fat and stabilise blood sugar levels.
Brain Health
- Boosted Cognitive Function: Caffeine enhances mental clarity, focus, and memory.
- Neuroprotective Effects: Studies show that regular coffee consumption may lower the risk of neurodegenerative diseases like Alzheimer’s and Parkinson’s.
The combination of fasting and coffee could improve your focus, making it easier to power through your fasted period. Learn more about the broader health benefits of coffee.
Added Ingredients Could Reduce Fasting Benefits
While black coffee supports fasting, adding sugar, milk, cream, or sweetened syrups can disrupt fasting due to their calorie content. These ingredients trigger insulin production, shifting your body out of a fasted state.
Adding almond milk to coffee can also break a fast due to its caloric content, similar to other milk options.
Instead of sugary additions, consider unsweetened alternatives like:
- Cinnamon
- Vanilla extract
- Cocoa powder
These options can enhance flavour without compromising your fasting goals. If you prefer a low-calorie, fasting-friendly coffee option, explore our Vietnamese Coffee and Vietnamese coffee sachets.
Other Considerations
When drinking coffee while fasting, keep these factors in mind:
- Timing Matters: Drinking coffee late in the day may disrupt sleep. Aim to consume it earlier to maximise benefits.
- Hydration: Coffee is a diuretic, so it’s essential to stay hydrated by drinking plenty of water.
- Caffeine Sensitivity: If you’re sensitive to caffeine, excessive consumption could lead to jitters or anxiety.
- Herbal Tea: Consider herbal tea as a caffeine-free alternative. It can be consumed during intermittent fasting periods, providing hydration without breaking your fast and improving sleep quality.
Coffee can be a great ally during fasting, but it’s essential to listen to your body. By understanding your tolerance and timing, you can enjoy its benefits without negative side effects.
Should You Drink Coffee While Fasting?
The decision to drink coffee during fasting depends on individual preferences and tolerance. Here are the pros and cons to consider:
During the fasting period, managing coffee consumption can maximize benefits by timing it appropriately and ensuring hydration.
Pros of Drinking Coffee When Fasting
- Appetite Suppression: Coffee helps control hunger, making it easier to stick to your fasting window. Additionally, it can make it easier to adhere to your eating window by curbing appetite during fasting periods.
- Increased Energy: Caffeine offers a natural energy boost during fasting.
- Enhanced Fat Burning: Coffee supports metabolism, promoting fat loss.
- Improved Focus: The cognitive benefits of coffee enhance productivity.
Coffee provides a powerful combination of physical and mental benefits, making it an excellent companion for fasting routines.
Cons of Drinking Coffee When Fasting
- Potential Stomach Discomfort: Coffee on an empty stomach may cause acid reflux or irritation for some people.
- Dependence on Caffeine: Over-reliance on coffee can lead to caffeine addiction.
- Sleep Disruption: Drinking coffee too late can interfere with your sleep patterns.
While coffee has many advantages, moderation is key to avoid these drawbacks. Understanding these pros and cons will help you make an informed choice.
Does Coffee Break a Fast?
In its purest form, black coffee does not break a fast. However, any added calories from sugar, milk, or cream can disrupt the fasting state. To maximise fasting benefits, stick to plain black coffee or experiment with unsweetened additions.
Black coffee is an ideal choice for those who fast because it’s calorie-free and enhances fasting’s metabolic effects. But if you love experimenting with flavours, opt for low-calorie additions like spices.
FAQs
Does Coffee With Milk Break a Fast?
Yes, adding milk to coffee introduces calories and disrupts the fasting state. Stick to black coffee or use a splash of unsweetened alternatives in moderation if needed.
How Much Coffee Can I Drink While Fasting?
Moderation is key. Consuming 1–2 cups of black coffee per fasting window is generally safe and beneficial. Excessive intake might lead to side effects like jitteriness or stomach discomfort.
Can I Have Sweeteners in My Coffee While Fasting?
Artificial sweeteners like stevia or erythritol are low-calorie options that may not break your fast. However, some studies suggest they might influence insulin levels, so use them sparingly.
What Happens if I Drink Too Much Coffee While Fasting?
Excessive coffee consumption can lead to dehydration, jitters, or an upset stomach. Stick to a moderate intake to avoid these issues while reaping the benefits of fasting.
Conclusion
So, can you drink coffee while fasting? Absolutely—especially if it’s black and calorie-free. Not only does black coffee support fasting, but it may also enhance benefits like improved metabolism and brain health. However, moderation is key. Too much coffee can lead to side effects like stomach discomfort or disrupted sleep.
To enjoy fasting-friendly brews, check out our drip filter coffee bags and Vietnamese coffee sachets. For more coffee tips and inspiration, explore our blog posts on Vietnamese coffee calories and why Vietnamese coffee is so strong.