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Intermittent fasting

Intermittent fasting calculator

Pick your fasting method and first-meal time to see your exact eating and fasting windows.

Your first-meal time starts the eating window; the fast runs until the next day's first meal.

Eating window

Fasting window

Fasting isn't for everyone — skip it if pregnant, under 18, or with a history of disordered eating, and check with a doctor if unsure.

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What is intermittent fasting?

Intermittent fasting cycles between eating and fasting periods. Popular schedules like 16:8 keep all your meals inside an 8-hour window. It doesn't change what you eat — only when.

Does it help with weight loss?

Fasting mainly helps by making it easier to eat less. Weight loss still needs a calorie deficit — set your target with the calorie calculator and log meals from the food list.

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