The short answer · Insomnia severity
Take melatonin for insomnia severity. This is the one to buy.
21st Century, Melatonin, 5 mg, 120 Tablets
4.7· 14,491 ratings· $0.07/serving
Melatonin 5 mg — inside the studied 2-5 mg window
Of 1,518 products scored for Insomnia severity, 21st Century, Melatonin, 5 mg, 120 Tablets ranks #1 with a DoseRank score of 86. Melatonin is the strongest evidence signal for this outcome.
Retailer links may be affiliate links. Rankings and placement are never paid.
The form“Why Melatonin?”Evidence Strong evidence
Melatonin is the strongest evidence signal for this outcome.
- MelatoninThe pick
Strong evidence · 5 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 90
Melatonin at 5 mg lands inside the studied 2-5 mg window.
Melatonin
Studied window 2-5 mg · this pick 5 mg
The ranking“Why should I trust this pick?”Trust 93
Strong trust signals — consistently high marks from verified buyer ratings. Each product gets a DoseRank score blending clinical strength, evidence, dose fit, trust and value. Retailer links may be affiliate links — the scoring model decides placement, never payment from a brand.
- 1,518 products scored
- Never paid placement
- Evidence level: Strong · 87
- 263 brands
- 11 ingredients
The price“Can I do better than $0.07 a serving?”Value 76
$0.07 per serving — mid price tier for this outcome. The cheapest ranked pick here is $0.04 per serving.
- 5Nutricost, Melatonin, 10 mg, 240 TabletsScore 86 · $0.04/servingiHerb
- 921st Century, Melatonin, 3 mg, 200 TabletsScore 85 · $0.04/servingiHerb
Why not the absolute cheapest? The DoseRank score also weighs clinical strength, evidence, dose fit and trust — the very cheapest listings rarely hold up everywhere else.
Ready?
The #1 pick is $0.07 a serving.21st Century, Melatonin, 5 mg, 120 Tablets — in stock at a tracked retailer.
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21st Century, Melatonin, 5 mg, 120 Tablets ranks #1 for Insomnia severity with a DoseRank score of 86. The score blends clinical strength, evidence, dose fit, trust signals and value across 1,518 products scored for this outcome.
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