Who should not fast (or only with a doctor)

Fasting is not for everyone. Check this list before you start.

bitetracking is a tracking tool, not a medical treatment. Talk to a health professional before fasting if:

• You are pregnant or breastfeeding.
• You are under 18.
• You have or had an eating disorder.
• You have diabetes, especially if you use insulin or glucose-lowering drugs.
• You take medicines that must be taken with food.
• You are underweight, or have kidney, liver or heart disease, or gout.

Signs to stop

Strong dizziness, fainting, palpitations, confusion or discomfort that does not go away: end your fast, eat something, and get checked if it happens again.

Sources

• de Cabo R, Mattson MP. N Engl J Med. 2019;381:2541-2551.

General information; not a substitute for a health professional.