The short answer · Sleep latency
Take melatonin for sleep latency. This is the one to buy.

21st Century, Melatonin, 3 mg, 200 Tablets
4.8· 12,805 ratings· $0.04/serving
Melatonin 3 mg — inside the studied 0.3-5 mg window
Of 2,120 products scored for Sleep latency, 21st Century, Melatonin, 3 mg, 200 Tablets ranks #1 with a DoseRank score of 87. Melatonin is the strongest evidence signal for this outcome.
The form“Why Melatonin?”Evidence Strong evidence
Melatonin is the strongest evidence signal for this outcome.
- MelatoninThe pick
Strong evidence · 3 mg
Sleep hormone signaling darkness that shifts circadian timing; works at low doses (0.5-1 mg) for jet lag, not as a sedative.
The dose“Is the dose actually effective?”Dose fit 80
Melatonin at 3 mg lands inside the studied 0.3-5 mg window.
Melatonin
Studied window 0.3-5 mg · this pick 3 mg
The ranking“Why should I trust this pick?”Trust 95
Questions
Frequently asked
21st Century, Melatonin, 3 mg, 200 Tablets ranks #1 for Sleep latency with a DoseRank score of 87. The score blends clinical strength, evidence, dose fit, trust signals and value across 2,120 products scored for this outcome.
Melatonin is the strongest evidence signal for this outcome.
Melatonin at 3 mg lands inside the studied 0.3-5 mg window. DoseRank scores this product's dose fit at 80 out of 100.
21st Century, Melatonin, 3 mg, 200 Tablets works out at $0.04 per serving. $0.04 per serving — low price tier for this outcome. The cheapest ranked pick here is $0.04 per serving.
No. Retailer links may be affiliate links, but rankings and placement are never paid. Every product is scored by the same public model, and the ranking is recomputed from the underlying product data rather than edited by hand.
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