BioStacks

Best Melatonin for Sleep

Top 10 products ranked

Last reviewed May 2026

Clinical dose: 0.5–5 mg

Why Melatonin for Sleep

Melatonin plays a key role in sleep. Melatonin is a hormone that regulates sleep-wake cycles. Supplemental melatonin is commonly used for sleep onset and jet lag. In clinical studies, melatonin supports sleep onset and circadian rhythm regulation.

What dose to look for

Clinical studies typically use 0.5–5 mg of melatonin. Common supplemental range; lower doses (0.5-1 mg) may be as effective as higher doses for sleep onset. Products below this range may not deliver meaningful results.

What the research says

Melatonin has strong clinical evidence for sleep benefits. Multiple clinical trials confirm reduced sleep latency and jet lag symptoms at doses as low as 0.5mg Learn more

Clinical research on Melatonin

HIGH — 50+ systematic reviews, hundreds of RCTs · 0.5–5 mg/day (peaks at ~4 mg)

•Meta-analysis of 19 RCTs (1,683 subjects) found melatonin significantly reduced sleep onset latency (7 min), increased total sleep time (8 min), and improved overall sleep quality. Effects did not dissipate with continued use. PubMed
•2024 dose-response meta-analysis of 26 RCTs found melatonin's sleep benefits peak at 4 mg/day. Administering 3 hours before bedtime (not 30 minutes) optimized efficacy. PubMed
•2022 meta-analysis of 23 RCTs found significant improvement in PSQI scores (WMD: -1.24, p < 0.001). PubMed
•2026 scoping review identified 57 systematic reviews comprising 227 meta-analyses — confirming melatonin as the most-studied sleep supplement.
•Important nuance: absolute effect sizes are modest. Melatonin is a circadian signal (zeitgeber), not a sedative — mega-dosing above 4-5 mg offers diminishing returns.