Medically reviewed by Jamie Johnson, RDN Melatonin is generally safe, but it can cause side effects if you take it in high ...
Fitgurú on MSN
Why Doctors Warn Against Taking Melatonin Every Nightand the Alternatives That Actually Work
Melatonin may help with jet lag or temporary sleep problems, but nightly use can mask the real cause of insomnia—and many popular supplements contain much more than most adults need.
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