16:8 intermittent fasting
A 16-hour fast with an 8-hour eating window — the most widely practised intermittent fasting schedule.
16h
Jejum
8h
Janela de alimentação
Horário de exemplo
Eating window opens at 12:00 PM
Start your first meal of the day.
Eating window closes at 8:00 PM
Finish your last meal for the day.
Fast until 12:00 PM the next day
16-hour fasting window begins.
Para quem é adequado
- People new to intermittent fasting
- Those who want a structured eating window without extreme restriction
- People who skip breakfast naturally
Pros and cons
Prós
- Well-studied and widely supported in the research literature
- Flexible — many different eating window timings are possible
- Compatible with social eating for most people
Contras
- May feel challenging in the first week before the body adapts
- Evening social meals can shift the window later than intended
- Requires consistent meal timing to build a reliable habit
Perguntas frequentes
- What can I drink during the 16-hour fast on 16:8?
- Plain water, black coffee, and unsweetened tea are generally considered fast-safe during a 16:8 fasting window. They contain negligible calories and do not produce a meaningful insulin response for most fasting goals.
- Is 16:8 the same as skipping breakfast?
- For many people, 16:8 is effectively achieved by delaying the first meal of the day to around midday, which means skipping a traditional breakfast. However, some people shift their eating window earlier — eating from 8 AM to 4 PM — so skipping breakfast is not the only approach.
- How long does it typically take to adjust to 16:8?
- Many people report that hunger during the fasting window becomes easier to manage after one to two weeks as the body adapts to the new meal rhythm. Individual experience varies considerably.