Disclosure: We earn commissions on purchases made through our links. This never influences our scores. Editorial policy
Melatonin
Bottom line
In our scoring, Melatonin rates strong evidence: the research is strong for sleep onset latency. Our top-scored product is Melatonin 300 mcg (0.3mg) (91/100), about $0.08 a day at a clinical dose of 0.3-5mg taken 30-60 minutes before bed. Bottom line: worth it for the right goal. This is our opinion, not medical advice; talk to your clinician before starting.
Melatonin is not a sedative, even though most people treat it like one.
- Evidence
- Strong Evidence
- Category
- Sleep & Relaxation
- Best form
- Immediate-release (standard)
- Effective dose
- 0.3-5mg taken 30-60 minutes before bed
- Lab tested
- 4 of 8 products
- Category
- Sleep & Relaxation
- Best form
- Immediate-release (standard)
- Effective dose
- 0.3-5mg taken 30-60 minutes before bed
- Lab tested
- 4 of 8 products
Key takeaways
- →Strong for jet lag and ~7-minute faster sleep onset; melatonin signals sleep timing rather than causing sleep, so it works for circadian misalignment, not general insomnia.
- →Effective dose is 0.3-3mg, not the 5-10mg pharmacy default. 0.3mg matches natural levels; 10mg causes morning grogginess without better sleep.
- →Label content varies wildly (range: 83% under to 478% over actual). Life Extension 0.3mg ($0.05/day) is correctly dosed and third-party tested.
- →Won't help sleep-maintenance insomnia (waking through the night). CBT-I is first-line for chronic insomnia; children need pediatrician guidance.
What Is Melatonin?
Melatonin is not a sedative, even though most people treat it like one. It does not knock you out the way a sleeping pill does. It works by timing - it tells your body's internal clock (your circadian rhythm) that night has arrived, and it shifts that clock more than it sedates you. So it earns its keep when your problem is a clock problem - jet lag, shift work, or a sleep window that has drifted hours later than you want it - and does much less for ordinary insomnia. Across pooled randomized trials it shaves about 7 minutes off the time it takes to fall asleep and adds a little to total sleep time. Real, but small, and not a replacement for CBT-I if your insomnia is chronic.
For falling asleep faster, the evidence is the strongest melatonin has. Large reviews of randomized trials land in the same place again and again: roughly 7 minutes quicker to drop off, plus a modest bump in total sleep time. Those are not eye-popping numbers. But they are real, and they matter most when the reason you cannot sleep is that your clock is out of sync with the hour.
Jet lag is where melatonin shines - it is one of the best-supported supplements you can buy for it. Reviews keep finding that 0.5-5mg taken at your destination's bedtime softens jet lag after you cross five or more time zones. And for delayed sleep phase, when your natural sleep window sits hours later than the rest of the world expects, melatonin is recommended in clinical sleep medicine guidelines.
The dose is where most products on the shelf fail the person buying them. Walk into any US pharmacy and you will see 5mg, 10mg, even 12mg tablets stacked high - yet research shows 0.3mg is already enough to lift your blood melatonin to natural nighttime levels. Going above 5mg buys you more morning grogginess, not better sleep. For most adults the range that actually does something is 0.5-3mg.
One caveat worth flagging before you buy: if you fall asleep fine but wake repeatedly through the night for reasons that are not about your clock, melatonin is not your fix. It helps you fall asleep; it does not reliably keep you there. For chronic insomnia, cognitive behavioral therapy for insomnia (CBT-I) is still the first-line treatment.
Does It Work? The Evidence
How A-F grades workMelatonin earns a Strong Evidence rating on the strength of its best-supported uses: reducing sleep onset latency (time to fall asleep) and jet lag recovery (grade A). The table below grades every claimed benefit on its own, including weaker and more heavily marketed uses, so one strong result never stands in for the rest.
Reducing sleep onset latency (time to fall asleep)
Ferracioli-Oda et al. 2013 meta-analysis (19 RCTs): 7.06-minute reduction in sleep onset latency vs. placebo; Auld et al. 2017 meta-analysis confirms effect across primary sleep disorders
Jet lag recovery
Cochrane systematic reviews consistently find melatonin reduces jet lag severity when crossing 5+ time zones; optimal dose 0.5-5mg at destination bedtime
Shift worker sleep improvement
Costello et al. 2014 meta-analysis (9 RCTs, n=1,683): melatonin improved daytime sleep duration after night shifts; effects on alertness during shifts are weaker
Delayed sleep phase syndrome (DSPS)
Auld et al. 2017 meta-analysis: strongest effects seen in DSPS; endorsed by sleep medicine clinical guidelines for this specific indication
Total sleep time (overall sleep duration)
Ferracioli-Oda et al. 2013: 8.25-minute increase in total sleep time vs. placebo - statistically significant but modest in magnitude
Sleep maintenance insomnia (staying asleep)
Standard immediate-release melatonin shows minimal effect on sleep maintenance; extended-release formulations show modest improvement in some populations (particularly adults 55+)
Antioxidant / neuroprotective effects
Preclinical and in-vitro evidence suggests antioxidant properties; human RCT evidence for clinical benefit at supplement doses is insufficient
| Grade | Claimed Benefit | Key Studies | Our Verdict |
|---|---|---|---|
| A | Reducing sleep onset latency (time to fall asleep) | Ferracioli-Oda et al. 2013 meta-analysis (19 RCTs): 7.06-minute reduction in sleep onset latency vs. placebo; Auld et al. 2017 meta-analysis confirms effect across primary sleep disorders | Supported |
| A | Jet lag recovery | Cochrane systematic reviews consistently find melatonin reduces jet lag severity when crossing 5+ time zones; optimal dose 0.5-5mg at destination bedtime | Supported |
| B | Shift worker sleep improvement | Costello et al. 2014 meta-analysis (9 RCTs, n=1,683): melatonin improved daytime sleep duration after night shifts; effects on alertness during shifts are weaker | Supported |
| B | Delayed sleep phase syndrome (DSPS) | Auld et al. 2017 meta-analysis: strongest effects seen in DSPS; endorsed by sleep medicine clinical guidelines for this specific indication | Supported |
| B | Total sleep time (overall sleep duration) | Ferracioli-Oda et al. 2013: 8.25-minute increase in total sleep time vs. placebo - statistically significant but modest in magnitude | Early Signal |
| C | Sleep maintenance insomnia (staying asleep) | Standard immediate-release melatonin shows minimal effect on sleep maintenance; extended-release formulations show modest improvement in some populations (particularly adults 55+) | Conflicted |
| D | Antioxidant / neuroprotective effects | Preclinical and in-vitro evidence suggests antioxidant properties; human RCT evidence for clinical benefit at supplement doses is insufficient | Not There Yet |
How to Choose: Forms, Doses & What Matters
Clinical dose: 0.3-5mg taken 30-60 minutes before bed; lower doses (0.3-1mg) are often as effective as higher doses with fewer next-day side effects
Best forms: Immediate-release (standard), Extended-release / time-release (for sleep maintenance rather than onset)
Take 0.3-3mg about 30-60 minutes before the bedtime you are aiming for, and start low - 0.3-0.5mg is often plenty and leaves you with fewer side effects than the 5-10mg doses stacked on pharmacy shelves. Take it at the same time every night; melatonin works by nudging your clock, and a consistent signal helps that clock settle. For jet lag, take it at 10pm-midnight local time at your destination, starting the night before you fly or your first night there. One easy mistake to avoid: do not sit in bright light after you take it. Light suppresses your own melatonin and will blunt the dose. And if your real problem is waking up in the middle of the night rather than falling asleep, an extended-release version (one that drips the dose out slowly instead of all at once) is worth a look.
Who Should Take Melatonin?
If you are flying across time zones, this is your strongest case - jet lag is melatonin's best-evidenced use. It also fits if your sleep window has drifted late (delayed sleep phase syndrome - you cannot fall asleep until 1-3am or later no matter how tired you are), or if you work nights and have to sleep during the day. The core profile: you struggle to fall asleep at the bedtime you want. That is different from falling asleep easily and then waking through the night - melatonin does little for the second group. Older adults are another well-studied fit, since your body makes less of its own melatonin as you age. And blind individuals, who lack the light cues that normally set the body clock, have strong clinical evidence behind melatonin use.
Who Should Avoid It?
Not for everyone
Side Effects & Safety
Product Scores
8 products scored on dosing accuracy, third-party testing, cost per effective dose, and label transparency.
The Scorecard: 8 Products Compared
Melatonin 300 mcg (0.3mg)
Life Extension$7.50 ÷ 94 days at 0.3mg/day (1 serving × 0.3mg)
One of the only mainstream brands selling the physiologically appropriate dose. Most studies showing melatonin works used 0.3-1mg. Starting here is the right call before ever trying a 5mg or 10mg product.
Prices checked 2026-06-09. Cost shown is per clinically effective daily dose, not per pill.
Melatonin 3mg
NOW Foods$8.70 ÷ 174 days at 3mg/day (1 serving × 3mg)
Solid choice at a reasonable dose. 3mg is arguably the highest dose most people need - if this is not working, the problem is likely not the dose.
Prices checked 2026-06-09. Cost shown is per clinically effective daily dose, not per pill.
Melatonin 3mg
Nature Made$7.97 ÷ 114 days at 3mg/day (1 serving × 3mg)
The combination of USP Verified status and wide availability at a low price point makes this one of the most practical recommendations for most people. Found in virtually every pharmacy and grocery store.
Prices checked 2026-06-09. Cost shown is per clinically effective daily dose, not per pill.
Melatonin 0.5mg
Pure Encapsulations$12.50 ÷ 60 days at 0.5mg/day (1 serving × 0.5mg)
The best choice for people with sensitivities or allergies to common excipients. The dose is evidence-appropriate and the quality controls are among the best in the industry.
Prices checked 2026-06-09. Cost shown is per clinically effective daily dose, not per pill.
Melaton-3
Thorne$16.00 ÷ 59 days at 3mg/day (1 serving × 3mg)
The NSF Certified for Sport designation makes this the best choice for competitive athletes subject to drug testing. Also appropriate for anyone who wants the highest level of independent purity verification.
Prices checked 2026-06-09. Cost shown is per clinically effective daily dose, not per pill.
Melatonin Advanced Sleep 5mg Time Release
Natrol
$9.99 ÷ 100 days at 5mg/day (1 serving × 5mg)
The extended-release format is potentially useful for sleep maintenance complaints, but the 5mg dose is higher than most people need. Consider trying a lower-dose extended-release product first. The lack of third-party certification is a meaningful limitation given documented industry-wide mislabeling of melatonin.
Prices checked 2026-06-09. Cost shown is per clinically effective daily dose, not per pill.
Sleep with Melatonin Gummies (1mg)
Zarbee's
$13.99 ÷ 61 days at 1mg/day (1 serving × 1mg)
Good dose, palatable format for those who cannot swallow capsules. The lack of third-party testing and higher cost per dose relative to capsule/tablet alternatives are the main drawbacks. A reasonable option if palatability is a priority.
Prices checked 2026-03-01. Cost shown is per clinically effective daily dose, not per pill.
Melatonin 12mg Fast Dissolve
Carlyle
$9.49 ÷ 190 days at 12mg/day (1 serving × 12mg)
This product exemplifies the problem with the US melatonin market. At 12mg per tablet, it delivers roughly 40 times the dose that raises melatonin to natural nighttime levels. The dose offers no benefit over 1-3mg and meaningfully increases the risk of next-morning drowsiness and grogginess. There is no clinical rationale for 12mg in a healthy adult. Do not buy this.
Prices checked 2026-06-09. Cost shown is per clinically effective daily dose, not per pill.
Full Comparison
| Category | Melatonin 300 mcg (0.3mg) Life Extension | Melatonin 3mg NOW Foods | Melatonin 3mg Nature Made | Melatonin 0.5mg Pure Encapsulations | Melaton-3 Thorne | Melatonin Advanced Sleep 5mg Time Release Natrol | Sleep with Melatonin Gummies (1mg) Zarbee's | Melatonin 12mg Fast Dissolve Carlyle |
|---|---|---|---|---|---|---|---|---|
| Brand Score | 91/100Winner | 89/100 | 86/100 | 83/100 | 82/100 | 78/100 | 68/100 | 62/100 |
| Dosing & Form | 25/25Winner | 25/25 | 25/25 | 25/25 | 25/25 | 25/25 | 21/25 | 21/25 |
| Purity | 20/25 | 19/25 | 20/25 | 22/25 | 23/25Winner | 15/25 | 15/25 | 9/25 |
| Value | 23/25Winner | 22/25 | 21/25 | 13/25 | 11/25 | 19/25 | 13/25 | 19/25 |
| Transparency | 23/25Winner | 23/25 | 20/25 | 23/25 | 23/25 | 19/25 | 19/25 | 13/25 |
| Cost/Day | $0.08 | $0.05Winner | $0.07 | $0.21 | $0.27 | $0.10 | $0.23 | $0.05 |
| Dose/Serving | 0.3mg | 3mg | 3mg | 0.5mg | 3mg | 5mg | 1mg | 12mg |
| Form | Immediate-release tablet | Immediate-release capsule | Immediate-release tablet | Immediate-release capsule | Immediate-release tablet | Extended-release tablet | Gummy | Fast-dissolve tablet |
| Third-Party Tested | ✓ Yes | No | ✓ Yes | ✓ Yes | ✓ Yes | No | No | No |
| Proprietary Blend | No | No | No | No | No | No | No | No |
Frequently Asked Questions
Why do most melatonin products contain 5-10mg when studies show 0.3-1mg is effective?
This is one of the supplement industry's more notable misalignments between evidence and market reality. High doses of melatonin became standard in the US largely due to market forces and the mistaken assumption that 'more is better.' The FDA classifies melatonin as a dietary supplement rather than a hormone, so there is no regulatory cap on doses. Most other countries treat melatonin as a drug requiring a prescription and typically sell it in 0.1-2mg doses. Pharmacokinetic research shows 0.3mg raises blood melatonin to natural nighttime levels; a 10mg dose produces concentrations roughly 50-100 times higher than your body naturally generates. This excess does not improve sleep and increases the likelihood of next-morning grogginess.
What is the difference between immediate-release and extended-release melatonin?
Immediate-release melatonin dissolves quickly and reaches peak blood levels within 30-60 minutes, then declines over the next few hours. It is best suited for helping you fall asleep. Extended-release (also called sustained-release or time-release) formulations are designed to release melatonin gradually over 6-8 hours, theoretically maintaining levels throughout the night. There is some evidence that extended-release versions improve sleep maintenance in adults over 55, but the evidence is weaker than for immediate-release on sleep onset. If your primary complaint is taking too long to fall asleep, use immediate-release. If you fall asleep easily but wake at 3am, extended-release is worth trying.
Can melatonin become habit-forming or stop working over time?
Melatonin is not considered habit-forming and does not produce the tolerance, dependence, or withdrawal effects associated with sleep medications like benzodiazepines or Z-drugs. However, some people do report that it seems less effective over time - this may reflect expectations, or may indicate that the original sleep problem has changed. If you find yourself relying on melatonin nightly for general insomnia, that is a signal to address the underlying cause, potentially with cognitive behavioral therapy for insomnia (CBT-I), which has better long-term evidence for chronic insomnia than any supplement.
Is melatonin safe for children?
Melatonin is frequently used for children, but this use has outpaced the evidence. Short-term use for children with specific conditions - notably autism spectrum disorder and ADHD-related sleep difficulties, where strong evidence exists - is different from using it for typical childhood sleep resistance at bedtime. The American Academy of Pediatrics does not recommend melatonin as a first-line intervention for healthy children with behavioral sleep problems. For any child, consult a pediatrician before starting melatonin. Keep doses minimal (0.5-1mg or less) and use it short-term while addressing underlying sleep hygiene issues.
How effective is melatonin for jet lag?
Jet lag is arguably the best-evidenced application for melatonin. Multiple Cochrane reviews have found that melatonin significantly reduces jet lag symptoms when crossing 5 or more time zones, particularly on eastward travel (which is harder on the circadian system than westward). Take 0.5-3mg at 10pm local time at your destination, starting the day of travel or the night before arrival. Eastward travel generally requires 2-3 days of use; westward travel 1-2 days. It is less effective for short trips (under 3 days) where circadian adaptation is not worth pursuing.
What should I look for when buying melatonin?
Dose and form are the two decisions that matter most. Choose a product dosed at 0.3-3mg rather than the 5-10mg doses that dominate pharmacy shelves. If you have trouble falling asleep, choose immediate-release; if sleep maintenance is the issue, consider extended-release. Third-party testing matters because melatonin is notoriously mislabeled - a 2017 study published in the Journal of Clinical Sleep Medicine found that melatonin content across 31 supplements ranged from 83% less to 478% more than what was stated on the label. Choose a product with USP Verified or NSF certification, or one from a brand with published third-party testing.
Related Supplements
Related Reading
Related Articles
Sources
- Ferracioli-Oda E, Qawasmi A, Bloch MH. Meta-analysis: melatonin for the treatment of primary sleep disorders. PLOS ONE. 2013;8(5):e63773.
- Auld F, Maschauer EL, Morrison I, Skene DJ, Riha RL. Evidence for the efficacy of melatonin in the treatment of primary adult sleep disorders. Sleep Med Rev. 2017;34:10-22.
- Costello RB, Lentino CV, Boyd CC, et al. The effectiveness of melatonin for promoting healthy sleep: a rapid evidence assessment of the literature. Nutr J. 2014;13:106.
- Dollins AB, Zhdanova IV, Wurtman RJ, Lynch HJ, Deng MH. Effect of inducing nocturnal serum melatonin concentrations in daytime on sleep, mood, body temperature, and performance. Proc Natl Acad Sci USA. 1994;91(5):1824-1828.
- Herxheimer A, Petrie KJ. Melatonin for the prevention and treatment of jet lag. Cochrane Database Syst Rev. 2002;(2):CD001520.
- Erland LAE, Saxena PK. Melatonin natural health products and supplements: presence of serotonin and significant variability of melatonin content. J Clin Sleep Med. 2017;13(2):275-281.
- NIH Office of Dietary Supplements. Dietary Supplement Fact Sheet: Melatonin. National Institutes of Health.
- Lemoine P, Nir T, Laudon M, Zisapel N. Prolonged-release melatonin improves sleep quality and morning alertness in insomnia patients aged 55 years and older and has no withdrawal effects. J Sleep Res. 2007;16(4):372-380.
Scores and tiers are our independent opinion, formed by applying a published rubric to label data, third-party certifications, and the research record. They are not statements of objective fact about a product and not a lab test. Where we report a brand-specific fact, it comes from a cited source or a public certification; where verification is missing, we say so rather than assume a result.
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products discussed on this page are not intended to diagnose, treat, cure, or prevent any disease. Always consult with a qualified healthcare professional before starting any supplement regimen.