Coffee and Intermittent Fasting – Can you drink Coffee while fasting?

Coffee and intermittent fasting are two practices that have gained popularity in recent years for their potential health benefits.

Intermittent fasting is a diet that consists of eating and fasting for specific periods of time. It’s been linked to weight loss, improved insulin sensitivity, and better overall health.

What is intermittent fasting?

Intermittent fasting is an eating pattern that alternates periods of eating and fasting. Popular forms of intermittent fasting include the 16/8 method, where you fast for 16 hours and eat in an 8-hour window, and the 5:2 diet, where you eat normally for 5 days and the rest of them only eats 500-600 calories for 2 non-consecutive days.

The idea behind intermittent fasting is that it helps the body burn fat for fuel instead of relying on glucose from carbohydrates.

How coffee affects intermittent fasting

Black coffee, which is just coffee and water, is generally considered “fasting-friendly” because it contains no calories and doesn’t raise insulin levels, which can interfere with fat burning. Therefore, the fast is not broken. Consuming only coffee during the fasting period can even give you a slight boost of energy thanks to the caffeine. However, if you add ingredients like milk, sugar, or artificial sweeteners to your coffee, you’re consuming calories that can break the fast. The same applies to all other calorie-containing beverages, e.g. B. Tea with milk or a milkshake.

Possible benefits of drinking coffee while intermittent fasting

One of the potential benefits of drinking coffee while intermittent fasting is that it may improve insulin sensitivity. Studies have shown that caffeine, the active ingredient in coffee, can increase insulin sensitivity. This can help the body better regulate blood sugar levels. This can be beneficial for people who have or are at risk of type 2 diabetes.

In addition, coffee has been shown to have a thermogenic effect, meaning it can boost metabolism and help with weight loss. However, it should be noted that these effects may vary from person to person. More research is needed to fully understand how coffee affects insulin sensitivity and weight loss.

Possible downsides of drinking coffee while intermittent fasting

Drinking coffee while intermittent fasting can also have its downsides. One of the main downsides is that caffeine can disrupt sleep, which can have a negative impact on overall health. Also, consuming too much caffeine can lead to nervousness, anxiety, and other negative side effects. It’s important to monitor caffeine consumption and how the body is responding, as well as respecting individual tolerance and preferences.

Additionally, drinking coffee while fasting can induce hunger pangs in some people, which disrupts the fasting process and leads to overconsumption during the fasting period. If you have a history of eating disorders or have an eating disorder, you should consult a doctor before adding coffee to your fasting regimen.


Black coffee can be consumed while fasting as long as you don’t add calories to it. However, if you want to maximize the benefits of intermittent fasting, stick to water and other non-caloric beverages. Keep in mind that the effects of coffee on fasting can vary from person to person. It’s always a good idea to talk to your doctor or nutritionist before beginning any new diet.