The libraryRecovery
Melatonin
The effect on falling asleep peaks at 4 mg taken about 3 hours before your intended bedtime.
Also called N-Acetyl-5-methoxytryptamine, 5-Methoxy-N-acetyltryptamine, Circadin, Slenyto
Who it's forAny man swallowing a gummy at lights-out and wondering why it barely works.
The item
Three squares: proven in human trials. Two: a strong signal. One: early human data. Striped: the trials disagree.
Start today
- Set a recurring phone alarm for three hours before bed and label it melatonin.
Why it works
It is a timing signal, not a sedative. The brain's master clock reads light from the eye and holds back its release during daylight, so it rises in darkness. Its two receptors do different jobs. One quiets firing in the clock and helps start sleep. The other shifts the clock's timing. That is why the hour you take it matters more than the size of the dose. Given each at its own best time, 0.5 mg and 3.0 mg shift the clock by a similar amount. For falling asleep, the benefit peaks at around 4 mg taken about three hours before your planned bedtime.
The doses the studies used
| Study / Context | Route | Dose | Duration |
|---|---|---|---|
| Review, 26 trials (PMID 38888087) - optimum | Oral | 4 mg/day, the dose with the biggest effect | One dose about 3 hours before the intended bedtime |
| The same review of the trials - schedule most used in clinical practice | Oral | 2 mg/day | One dose 30 minutes before bedtime |
| High-dose safety review, 79 trials, 3,861 adults over 30 (PMID 34923676) | Oral | 10 mg or more - the threshold the review calls high dose | Durations varied across the 79 trials |
| NCT03954899, thinking & Alzheimer's biomarkers (recruiting) | Oral | 5 mg | 30 minutes before sleep, for 9 months |
| NCT06826755, nocturnal blood pressure in midlife women (recruiting) | Oral, sustained release | 5 mg SR | 1 hour before bed, for 12 weeks |
| NCT04631341, cancer & CV events, ages 60-74 (not yet recruiting) | Oral | 5 mg | Every night for one year |
Where it fits
Melatonin is a move in 10 protocols. Each one opens the plan it sits in.
What people say
Here is what doctors, influencers and men online say about Melatonin, word for word.
Experts
Clinicians, authorities
“That is, taking melatonin just before you want to get to sleep, does help you get to sleep. The evidence on this is pretty unanimous.”
“Taking melatonin tablets adds to your body's natural supply of the hormone. This can help you get to sleep and improve the quality of your sleep.”
“There is little to no evidence that it works as a sleep aid for this purpose. It is best to see a sleep doctor who will recommend treatment for insomnia.”
Gurus
Podcasts, channels, influencers
“Also, it’s worth pointing out that many people find lower doses more sedating than higher doses.”
“Mice exposed to stress and took melatonin showed greater longevity and health than mice who did not take melatonin”
“it does not directly impact the duration of sleep, and we do not have clear evidence that it affects sleep quality under normal circumstances”
Regular people
Forums, reviews, comments
“It helps me fall asleep faster, but frequent urination from 5 am wakes me up, which is not normal. Then in the morning, feeling anxious and depressed for no specific reason”
“has an average rating of 5.8 out of 10 from a total of 250 reviews on Drugs.com. 46% of reviewers reported a positive experience, while 36% reported a negative experience.”
“It generally does help, but I can be groggy in the morning, if I took it too late in the evening. Happens sometimes.”
The studies
Every study behind this page.
- Meta-analysis: melatonin for the treatment of primary sleep disordersPubMed, PMID 23691095
- Optimizing the Time and Dose of Melatonin as a Sleep-Promoting Drug: A Systematic Review of Randomized Controlled Trials and Dose-Response Meta-AnalysisPubMed, PMID 38888087
- Safety of higher doses of melatonin in adults: A systematic review and meta-analysisPubMed, PMID 34923676
- Effects of Melatonin Supplementation On Blood Pressure: A Systematic Review and Meta-Analysis of Randomized Controlled TrialsPubMed, PMID 30861561
- Comprehensive Effects of Melatonin Supplementation on Cardiometabolic Risk Factors: A Systematic Review and Dose-Response Meta-AnalysisPubMed, PMID 41515249
- Registered trial NCT04631341Trial registry
- Registered trial NCT03954899Trial registry
- Registered trial NCT06826755Trial registry
Words on this page
- PMID
- A study's ID number in PubMed, the public index of medical research.
Take 4 mg three hours before bed. The hour beats the dose.
Emergency: call 911.
I am not a doctor. This is not medical advice. This is self-education. Talk to a physician who has your history before you change anything.