How much melatonin should you take?
The fight is over dose. Physiology-dose advocates hold to 0.3 to 1 mg. The retail market sells 5 to 10 mg gummies, and the high-dose longevity claims are built on top of them.
The two cases
The low-dose case
The body makes the equivalent of roughly 0.3 mg a night. Low doses restore physiologic levels; high doses produce blood levels far above anything the body makes, still elevated the next morning. Meta-analyses find melatonin shortens sleep onset by about 7 to 12 minutes on average, and low doses perform as well as high doses. Prolonged-release 2 mg is an approved insomnia medicine in the EU for adults over 55, which anchors the studied range at the low end.
The high-dose case
Antioxidant and immune claims trace mostly to preclinical work and small trials in specific diseases. For sleep, no trial shows 10 mg superior to 0.5 to 1 mg. The honest high-dose case is narrow: specific clinical contexts under supervision, not consumer sleep use.
Where each side overclaims
The market side sells "more is better," which is a shelf strategy, not a finding, on top of a label-accuracy problem: a 2017 analysis (Erland and Saxena) found melatonin content from 83 percent below to 478 percent above the label across products, with serotonin present in some. Pediatric ingestions rose about 530 percent from 2012 to 2021 in CDC data, the safety context for gummy formats in homes. The low-dose purists overreach when they sell precision: melatonin's average effect is modest at any dose.
Our graded bottom line
Melatonin grades B on evidence and B on worth it in our library, at $5 to $8 a month. Our graded dose is 0.5 to 1 mg for sleep onset; higher doses are common but not better evidenced. The dose question has an evidence answer, and it is the low one. The 10 mg gummy is a marketing artifact sitting on a label-accuracy problem.
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Last updated 2026-10-23. Educational information, not medical advice.