Does Melatonin Break a Fast?
No, melatonin does not break a fast. It has no significant calories (a typical dose is less than 1 calorie) and doesn't trigger insulin responses. It's perfectly fine to take melatonin while fasting.
Short answer
No, melatonin does not break a fast. It has no significant calories (a typical dose is less than 1 calorie) and doesn't trigger insulin responses. It's perfectly fine to take melatonin while fasting.
Why people ask this
Melatonin is often taken before bed, which may fall within fasting hours, leading people to wonder if it affects their fast.
Does melatonin break a fast depending on your goal?
For weight loss
OKMelatonin has virtually zero calories. It won't affect your deficit or fat loss fast.
For metabolic health
OKMelatonin doesn't affect blood sugar or insulin. It's metabolically neutral during fasting.
For autophagy
OKMelatonin doesn't provide calories or interrupt autophagy. Some research suggests it may actually have supportive effects on cellular health.
Bottom line
Melatonin is fasting-friendly. Good sleep supports all health goals, including the benefits of fasting. If melatonin helps you sleep better, there's no reason to skip it during a fast. Just avoid gummy melatonin, which often contains sugar.
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This information is for educational purposes only and is not medical advice. Consult a healthcare professional before making changes to your diet or fasting routine.