Does a gummy's label tell you how much melatonin you're taking?
Short answerNo
On this page
No. In a 2023 lab test of 25 melatonin gummies sold in the US, 22 didn’t match their label. One had no melatonin that could be detected, and the rest held anywhere from 74 to 347 percent of the stated amount. Most held more than the label said, usually 1.2 to 1.7 times.
What we’d do
Treat a gummy’s label as a range, and start lower than you think you need. If you want to know your dose, use small tablets from a brand that has each batch tested by an outside lab. And if a gummy hits harder than its label suggests, believe your morning over the bottle.
If you remember three things
- 22 of 25 missed. Only three gummies in the test held what they said.
- The misses ran high. A “5 mg” gummy most likely held 6 to 8.5 mg, and could have held 17.
- Nobody checks first. In the US the FDA doesn’t approve supplement labels before they’re sold.
Why it seems obvious
The number is printed on the front, the dose is in milligrams, and it looks like any medicine label. For a drug sold over the counter, the number is checked. It’s natural to assume a supplement next to it on the shelf works the same way.
It doesn’t. The FDA says nothing in the law lets it approve supplements for safety before they reach you, and it generally doesn’t approve their labels before use. The company that makes it is responsible for getting it right.
A generous measuring cup
A gummy label is like baking with a measuring cup whose lines might be off by anything from a quarter too small to three and a half times too big. Most of the time it pours a bit generous.
For flour that ruins a cake now and then. For melatonin, an extra few milligrams is extra hours in your blood.
What the tests found
25 gummies, 2023. Pieter Cohen of Cambridge Health Alliance and researchers at the University of Mississippi bought 25 products sold in the US as melatonin gummies and measured what was in them. 22 were inaccurately labeled. One had no detectable melatonin. The other 21 held 74 to 347 percent of the label, and most held 1.2 to 1.7 times the label.
31 supplements, 2017. A study of 31 melatonin supplements of different brands and forms found melatonin from 83 percent below to 478 percent above the label. More than 71 percent were off by more than 10 percent, and one product varied by as much as 465 percent from one lot to the next. The misses didn’t line up with the brand or the type of product. Eight of the 31 also held serotonin.
What it means for your dose
| Label says | Most likely holds | Could hold |
|---|---|---|
| 3 mg | 3.6 to 5.1 mg | 2.2 to 10.4 mg |
| 5 mg | 6 to 8.5 mg | 3.7 to 17 mg |
| 10 mg | 12 to 17 mg | 7.4 to 35 mg |
The likely range uses the 1.2 to 1.7 times most gummies held. The full range uses the lowest and highest of the gummies that had any melatonin.
Since 0.3 mg brings your blood to about a normal night’s level, a “5 mg” gummy that really holds 17 mg starts at more than 50 times a normal night. Your dose across the night draws a gummy as a band for this reason.
The best case for trusting the label
“It’s only gummies, and only one study.” Gummies were the form tested in 2023, but the 2017 study covered several forms and found the same kind of spread. And the misses in the gummy test mostly ran high, so if a label is wrong, it’s usually wrong in the direction of more.
“My brand is a big name.” In the 2017 study the misses didn’t follow the brand. One product varied by up to 465 percent between lots, so even last month’s bottle doesn’t tell you about this month’s.
Why children are the biggest worry
Gummies are the form children get into. A CDC report counted about 11,000 emergency visits from 2019 to 2022 for children 5 and under who swallowed melatonin on their own. Where the form was recorded, gummies were the most common, and more than a third of the children had got into 10 or more pieces. Ten pieces of a gummy that holds three times its label is a very different amount from what the jar says.
If a child swallowed melatonin, call Poison Control at 1-800-222-1222, and 911 if they can’t be woken or have trouble breathing.
What’s really in a US bottle has how to buy it, and what’s in food.
6 sources
- Cohen PA and others, Quantity of melatonin and CBD in melatonin gummies sold in the US, JAMA, 2023pubmed.ncbi.nlm.nih.gov
- National Center for Complementary and Integrative Health, Melatonin: What You Need To Know, last updated May 2024nccih.nih.gov
- Erland LAE, Saxena PK, Melatonin natural health products and supplements: presence of serotonin and significant variability of melatonin content, Journal of Clinical Sleep Medicine, 2017pubmed.ncbi.nlm.nih.gov
- US Food and Drug Administration, Questions and Answers on Dietary Supplementsfda.gov
- Dollins AB and others, Effect of inducing nocturnal serum melatonin concentrations in daytime on sleep, mood, body temperature, and performance, PNAS, 1994pubmed.ncbi.nlm.nih.gov
- Freeman DI and others, Emergency department visits for unsupervised pediatric melatonin ingestion, United States, 2019-2022, MMWR, 2024pubmed.ncbi.nlm.nih.gov
