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A member asked:
Why does melatonin supplement makes me sleepy during the day,if i take at 11pm ?
A doctor has provided 1 answer
Some thoughts: The half life is the scientific term for when 1/2 of the original dose has left the body. It is considered gone in 4 half lives. For melatonin the cited half life is up to an hour. However, for some prolonged use or high doses can lead to side effects like dizziness or sleepiness. It can take 6 mo off any melatonin supplement for this to clear. Try cutting the dose or skipping it for a while.
Answered 7/3/2020
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