The short answer
The best adult melatonin dose to start with is a low one: about 0.3 mg to 3 mg, taken 30 minutes before bed. That is the range sleep doctors point to, and it is much lower than the 5 mg and 10 mg doses that fill store shelves.
More melatonin does not mean better sleep. In one study of adults over 50, the smallest working dose was the one that matched the body best.1 In Europe, the official sleep claim for melatonin is based on just 1 mg.9
Key takeaways
- There is no official melatonin dose recommendation in the US. Melatonin is sold as a dietary supplement.
- A 0.3 mg dose brought night levels into the normal range in adults over 50. A 3 mg dose pushed levels far higher, into the next day.1
- Since 2012, the European Union has allowed a sleep claim for melatonin at 1 mg per serving.9
- Higher doses are more likely to bring side effects like daytime drowsiness, headache, and dizziness.5
- Labels are not always right. Some products hold far more, or far less, than they say.3,4
What is the recommended melatonin dose for adults?
In the US, melatonin is sold as a dietary supplement, not a drug. So there is no official melatonin dose recommendation on the label the way there is for a medicine. Brands pick their own amounts, which is why you see everything from 1 mg to 10 mg and up.
What we do have is research. The clearest dose study I know of comes from the Massachusetts Institute of Technology. Adults over 50 who had trouble sleeping took 0.1 mg, 0.3 mg, or 3 mg of melatonin 30 minutes before bed.1
- 0.3 mg brought their night melatonin back into a normal range and helped them sleep.
- 3 mg also helped, but it pushed levels far above normal, and they stayed high into the next day.
That is why sleep doctors talk about a small range, roughly 0.3 mg to 3 mg, for sleep. The goal is to match the signal your body makes, not to swamp it.
Europe settled on 1 mg years ago
In the European Union, supplements can only make health claims that regulators have approved. Since 2012, melatonin has had one approved sleep claim: that it "contributes to the reduction of time taken to fall asleep." A product may only use that claim if it holds at least 1 mg of melatonin per serving.9
Think about what that means. After reviewing the science, European regulators tied melatonin's sleep benefit to 1 mg, not 5 mg or 10 mg. Meanwhile, many products in the US start at 3 mg and go up from there. When I hear women say low dose melatonin "can't be strong enough," this is the first thing I point to.
Melatonin dosage chart for adults
| Dose | Where it sits | What to know |
|---|---|---|
| 0.1 to 0.3 mg | Very low | 0.3 mg matched normal night levels in adults over 50.1 Hard to find in stores. |
| 0.5 to 1 mg | Low | Inside the range sleep doctors point to. 1 mg is the amount behind the EU sleep claim.9 |
| 3 mg | Top of the range | Raised levels far above normal and into the next day.1 |
| 5 to 10 mg | High | The most common doses on US shelves. Well above what the body makes. |
On a phone, swipe the table sideways to see every column.
Why more melatonin is not better
Melatonin is a time signal. When it gets dark, your brain releases a small amount. That tells your body that night has started. It does not knock you out like a sleeping pill. Wondering if a small dose can really work? Read is 1 mg of melatonin enough.
When you swallow a pill, only a small share of the melatonin reaches your blood. A review of the research put it at about 15 percent on average.2 Your body then clears it fairly fast, with a half life of about 45 minutes.2 But a big dose starts from a much higher level. So it can stay above normal for hours, sometimes into the morning.1
That leftover melatonin is a common reason people wake up foggy. I explain this in why you feel groggy after melatonin.
What is the max melatonin dose?
There is no official maximum for melatonin supplements in the US. Many products go up to 10 mg, and some go higher. For sleep, those doses sit far above the range sleep doctors point to.
Higher is not safer or stronger in a useful way. Mayo Clinic lists headache, dizziness, nausea, and daytime drowsiness as the most common side effects of melatonin.5 Taking more makes it more likely you will notice them. If you take a high dose, talk to your doctor or pharmacist before you change it.
For signs of taking too much and what to do, read how much melatonin is too much.
How to find the right melatonin dose for you
- Start low. Begin near the bottom of the range, not the top. You can always talk to your pharmacist about adjusting it.
- Take it 30 minutes before bed. That is how it was taken in the MIT study.1 Take it at the same time every night.
- Give it several nights. Melatonin works as a signal, so a steady routine matters more than any one night.
- Do not double up at 3am. A second dose in the night can still be working when your alarm goes off.
- Choose a tested product. Look for a brand that has an outside lab check what is inside.
Is the dose different for women over 40?
There is no separate official dose for women. But age matters. Researchers have tracked a decline in melatonin across adult life.6 In one study, women past menopause had lower night melatonin than women in perimenopause.7
That is one reason I think a small, steady dose makes sense for women over 40. The aim is to support a signal that has grown weaker, not to replace it with a flood. If you are also waking in the night, read why you keep waking up at 3am.
Check the label, too
The dose on the bottle is not always the dose inside. A lab test of 31 melatonin products found some had 83 percent less than the label said, and some had 478 percent more.3 In a 2023 test of 25 melatonin gummies, 22 did not match their labels.4 Low dose melatonin only helps if it is really a low dose.
My pick
Why I chose 1 mg for Driffly
When I chose the formula for Driffly Night Reset Strips, I wanted the dose inside the range sleep doctors point to, and at the same amount behind the European sleep claim. That is why every strip has 1 mg.
- 1 mg of melatonin in each strip.
- No cutting pills in half to get a smaller dose.
- Melts on your tongue. No water and no sugar.
- Valerian root, lavender, chamomile, and hibiscus to support a calm wind down.*
Every order comes with a 30 night money back guarantee.
Common questions about melatonin dose
What is the recommended melatonin dose for adults?
There is no official US dose. Research and sleep doctors point to about 0.3 mg to 3 mg, taken 30 minutes before bed.1 Start low.
Is 10 mg of melatonin too much?
For sleep, 10 mg is far above the range most sleep doctors point to. In one study, even 3 mg pushed levels well above normal into the next day.1 If you take 10 mg, ask your doctor or pharmacist about a lower dose. Read more in how much melatonin is too much.
Is 1 mg of melatonin enough?
For many adults, yes. It sits inside the 0.3 mg to 3 mg range, and it is the amount behind the EU's approved sleep claim.9 In one study, an even smaller dose, 0.3 mg, helped adults over 50 sleep.1
Is 5 mg of melatonin a lot?
Yes, for sleep. 5 mg is above the range sleep doctors point to, even though it is one of the most common doses sold.
How long before bed should I take melatonin?
About 30 minutes before bed, at the same time each night.1 Do not wait until you are already lying awake. For timing and how long it stays in your system, read how long melatonin lasts.
How many melatonin gummies should I take?
Check how much melatonin is in each gummy, not just how many to take. Many hold 3 mg to 10 mg each, and labels are often off.4 Pick the lowest dose that works, and follow the label or your pharmacist's advice.
Can I take melatonin every night?
Many people take it nightly for short periods. Information on long-term safety is lacking.8 If you plan to take it for more than a few weeks, talk to your doctor. I cover this in detail in is melatonin bad for you?
When should I talk to my doctor?
Talk to your doctor or pharmacist before you use melatonin if you are pregnant, breastfeeding, or taking prescription medicine. Melatonin can interact with some medicines. Do the same if your sleep trouble lasts more than a few weeks.
Want to compare formats? Read melatonin strips vs gummies vs pills vs powders, or see 4 reasons melatonin has not worked for you.
Sources
- Zhdanova IV, Wurtman RJ, Regan MM, et al. Melatonin treatment for age-related insomnia. The Journal of Clinical Endocrinology and Metabolism. 2001;86(10):4727-4730.
- Harpsoe NG, Andersen LP, Gogenur I, Rosenberg J. Clinical pharmacokinetics of melatonin: a systematic review. European Journal of Clinical Pharmacology. 2015;71:901-909.
- Erland LA, Saxena PK. Melatonin natural health products and supplements: presence of serotonin and significant variability of melatonin content. Journal of Clinical Sleep Medicine. 2017;13(2):275-281.
- Cohen PA, Avula B, Wang YH, Katragunta K, Khan I. Quantity of melatonin and CBD in melatonin gummies sold in the US. JAMA. 2023.
- Mayo Clinic. Melatonin side effects: What are the risks? Expert Answers, Adult Health.
- Karasek M. Melatonin, human aging, and age-related diseases. Experimental Gerontology. 2004.
- Toffol E, Kalleinen N, Haukka J, Vakkuri O, Partonen T, Polo-Kantola P. Melatonin in perimenopausal and postmenopausal women: associations with mood, sleep, climacteric symptoms, and quality of life. Menopause. 2014.
- National Center for Complementary and Integrative Health. Melatonin: What You Need To Know.
- European Commission. Commission Regulation (EU) No 432/2012 establishing a list of permitted health claims made on foods (melatonin: reduction of time taken to fall asleep, at least 1 mg per portion). 2012.
Tyler Smith, RN, BSN, BA is a registered nurse and the founder of Driffly. He writes and reviews the articles in the sleep education hub. About Tyler
The author is the founder of Driffly, which sells the product mentioned in this article. This article is for education and is not medical advice. *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.