Low-calorie foods that fill you up include fiber-rich and high-water-content fruits and vegetables.
Remember that no food is realistically calorie-free, but some foods help by making you feel full on much lower calories per portion on a dirty fast schedule.
The Mayo Clinic suggests using low-energy-density fruits and vegetables packed with fiber and water to feel full on very few calories
The Mayo Clinic suggests using low-energy-density fruits and vegetables packed with fiber and water to feel full on very few calories
Fat is high-energy-density but could work in small amounts to keep you full during a fast (35). The USDA shows that a 5-gram pat of unsalted butter has 35.8 calories
Bulletproof or butter coffee is a popular go-to for fasting programs. Fat doesn’t elicit an insulin response, so some people allow themselves a small amount of fat while fasting.
A cup of bulletproof coffee can have over 300 calories . Due to that calorie load, we don’t recommend it, even for dirty fasting.