Intermittent fasting and coffee consumption : Benefits and precautions
Intermittent fasting is a dietary practice that involves alternating periods of fasting with windows during which you can eat. Very popular, it is often accompanied by questions about what can be consumed during fasting hours. Among non-caloric drinks, coffee is one of the most popular, yet also one of the most controversial.

What are its real benefits fasting ? What risks does it so poorly consumed ? This article sheds light on the effects of coffee during intermittent fasting and gives you practical advice on how to get the best out of it.
The role of coffee in the intermittent fasting
Why coffee is often associated with the intermittent fasting
During intermittent fasting, the periods without calorie intake can be difficult to manage, especially for beginners. Coffee, hot drink and a non-caloric, can become a ally of choice.
- It helps to reduce the sensation of hunger, thanks to its appetite-suppressant effects temporary.
- It provides a boost of energy, particularly useful for maintaining optimum productivity in a period of fasting.
In addition, the coffee is easy to integrate into daily habits, which makes it a natural option for a lot of people practicing fasting.
What science say about the coffee in a period of fasting
Caffeine, the main active compound in coffee stimulates the central nervous system, increasing alertness, and faster metabolism. Several studies indicate that moderate consumption of coffee during fasting does not interrupt the latter. However, it is crucial to consume it without sugar, milk or cream to avoid the calorie intake.
In addition, coffee contains antioxidants that are beneficial to health, such as polyphenols, which contribute to the reduction of inflammation.
The benefits of drinking coffee during intermittent fasting
Stimulation of the concentration and energy
Intermittent fasting can sometimes lead to temporary downturns in energy, especially when the body starts to adapt to this new routine. Coffee acts as a natural stimulant :
- It promotes the release of adrenaline, a hormone that stimulates the body and prepare them for the effort.
- It increases the mental clarity, ideal to maintain an optimal concentration at work or during strenuous activities.
Appetite suppressant and metabolism improvement
One of the main reasons why coffee is enjoyed in a period of fasting is its appetite suppressant effect. Caffeine acts on the hormone responsible for satiety, which can better tolerate the long hours of fasting.
In addition, the coffee boosts slightly metabolism, thus promoting a better fat burning. By combining coffee and fasting, the body is more encouraged to draw on its reserves of fat to produce energy.
Precautions to be taken to consume coffee during fasting
Impact on the acidity of the stomach and digestion
Despite its numerous benefits, the coffee may have some disadvantages, especially on the digestive system. Excessive consumption or fasting can increase the acidity of the stomach, which could cause :
- Heartburn.
- A feeling of abdominal discomfort.
To reduce these adverse effects, it is recommended to use a quality coffee (arabica) and not to abuse it.
The ideal dose to avoid side effects
The key is to consume coffee in moderation. Experts suggest not to exceed 2 to 3 cups per day, depending on your tolerance to the caffeine. Overconsumption can lead to side effects such as :
- Nervousness and anxiety.
- Heart Palpitations.
- Sleep disorders, especially if the coffee is consumed in the afternoon.
Alternatives to coffee for those who fast
If you do not want to consume coffee during your fasting, or if you are looking for an alternative, there are several options available to keep your energy while respecting the rules of fasting.
The health benefits of tea and infusions
Green tea, rich in antioxidants and L-theanine, offers an alternative to the soft-caffeine. It stimulates concentration while reducing stress. Other herbal tea has no calories, such as chamomile or rooibos, also can help maintain a good hydration without interfering with the fasting.
Water with lemon as a natural moisturizer
For those who wish to have a drink is simple and refreshing, the water lemon is an excellent option. Although she did not have the stimulating effects of coffee, it helps maintain a healthy digestion and detoxify the body.
Coffee can be a true ally during intermittent fasting, offering benefits such as a boost of energy, an appetite suppressant and a metabolism improvement. However, it is important to use it carefully to avoid side effects such as gastric acidity or disorders of the sleep.
In choosing alternatives such as tea or water with lemon, you can also vary your drinks while respecting the principles of intermittent fasting. As always, listen to your body and adjust your intake according to your needs.