Fastenfenster-Finder

Both approaches work. Skipping breakfast is more popular because it aligns naturally with most work schedules and social dinners. Skipping dinner can benefit sleep quality since your body is not digesting food overnight. Choose whichever fits your lifestyle — consistency matters more than which meal you skip.

Black coffee (no sugar, milk, or cream) is fine during a fast and will not break it. Coffee may actually support fasting by suppressing appetite and boosting fat oxidation. Avoid adding anything with calories — even a splash of milk contains enough to trigger an insulin response.

Start with a 14:10 protocol — a 14-hour fast with a 10-hour eating window. This often just means stopping eating a bit earlier and pushing breakfast back by an hour. After 1-2 weeks, try 16:8. Drink water, black coffee, or tea during the fast to manage hunger.

Consistency helps, but flexibility is fine. Many people follow their fasting schedule on weekdays and relax on weekends. A 5:2 approach (strict weekdays, relaxed weekends) can still produce results. The key is that your weekly average fasting hours remain high enough to see benefits.