Fasting has gained immense popularity in recent years, touted for its potential health benefits ranging from weight loss to improved metabolic health. However, the question of whether coffee breaks a fast remains a subject of debate among fasting enthusiasts. In this article, we delve into the science behind fasting and coffee consumption to uncover the truth.

Understanding Fasting

Fasting involves abstaining from food and caloric beverages for a specified period, typically ranging from 12 to 24 hours or even longer. During fasting, the body undergoes several physiological changes, including a decrease in insulin levels and an increase in fat utilisation for energy.

Coffee and Fasting

Coffee, a beloved beverage enjoyed by millions worldwide, contains caffeine and various compounds that can influence metabolic processes in the body. Many people wonder whether consuming coffee during fasting disrupts its benefits or undermines the physiological state of fasting.

The Verdict

The consensus among experts is that black coffee, consumed without additives such as sugar, milk, or cream, is unlikely to break a fast. Black coffee contains negligible calories and has minimal impact on insulin levels, making it compatible with fasting protocols such as intermittent fasting.

Benefits of Coffee During Fasting:

  1. Appetite Suppression: Caffeine, a natural appetite suppressant, can help curb hunger pangs during fasting periods, making it easier to adhere to a fasting regimen.
  2. Enhanced Cognitive Function: Coffee can improve alertness and mental clarity, which may be particularly beneficial during fasting when energy levels can fluctuate. Hot tip, adding natural nootropics can sky rocket your focus to new levels. In our Delta Blend Coffee we've added Ginseng, L-Theanine & Alpha GPC to give you coffee an extra boost.
  3. Increased Fat Oxidation: Some studies suggest that caffeine may enhance fat oxidation, potentially amplifying the fat-burning effects of fasting.


While black coffee is generally considered fasting-friendly, it's essential to be mindful of certain factors:

  1. Caloric Additions: Adding sugar, milk, or cream to your coffee can introduce calories and potentially disrupt fasting-induced metabolic changes.
  2. Individual Responses: Some individuals may experience gastrointestinal distress or heightened cortisol levels in response to caffeine, which could affect fasting outcomes.
  3. Timing: Consuming coffee too close to bedtime may interfere with sleep quality, which is crucial for overall health and well-being.

In conclusion, black coffee is unlikely to break a fast and may even offer some benefits when consumed during fasting periods. However, it's essential to enjoy coffee in its purest form, without added sugars or cream, to preserve the metabolic benefits of fasting. As with any dietary practice, individual preferences and tolerances should be considered when incorporating coffee into a fasting routine. Ultimately, moderation and mindful consumption remain key principles for optimising the benefits of both fasting and coffee consumption.

Here is some more info on how to fast with coffee, specifically the Delta Blend Performance Coffee.