protocols

What is alternate day fasting and does it work?

Alternate day fasting means cycling between normal eating days and fasting days. Here's how it works, who it's for, and whether it gets real results.

2026-05-24

Alternate day fasting (ADF) is a protocol where you fast every other day β€” one day you eat normally, the next you fast completely or eat very little. It works by pushing your body into fat-burning mode repeatedly, and the research and real-world results back it up as an effective approach for weight loss and metabolic health. Alternate day fasting is exactly what it sounds like: you cycle between fasting days and eating days. On a fasting day, you either…

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