10 Melatonin Side Effects
Melatonin Side Effect #6: Headaches
Melatonin is known for causing headaches, though this isn’t a common symptom and typically only occurs in people who are extremely sensitive or who are taking very high doses of the supplement. This is possibly because melatonin affects serotonin levels in the brain.
If you have a healthy balance of serotonin already, melatonin could throw this balance off, and one of the symptoms of serotonin imbalances include headaches.
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