Legal status · United States
Is Melatonin legal in the United States?
Written by Aaron CuhaReviewed Sep 2026
Direct answer
Melatonin can be sold in the United States as a supplement or cosmetic ingredient, classified as "Sold as a supplement". That is not drug approval: FDA has not evaluated any health claim, and injectable or "research use only" versions fall outside supplement rules, so that label does not make human use lawful. On the evidence, no human study is cited on its profile.
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Classification
Sold as a supplement
FDA approval and compounding status, from the Melatonin profile.
Reviewed Sep 2026. This is a classification, not legal advice.
A research-use-only label on a vial does not make human use lawful.
Melatonin in the United States at a glance
| Classification | Sold as a supplement |
|---|---|
| FDA approval status | Sold as a dietary supplement in the United States. Not approved as a hypnotic drug. Prescription melatonin-receptor agonists are separate medicines. |
| Human studies cited | 0 of 1 citations on the profile |
| Reviewed | Sep 2026 |
Classification and note come from the Melatonin profile, checked against U.S. Food and Drug Administration (FDA) listings at the reviewed date.
What this means
- 01
Melatonin can be sold in the United States as a supplement, food or cosmetic ingredient under the classification above, without drug approval.
- 02
Supplement status means FDA has not evaluated any health claim; manufacturers are responsible for safety and labeling, and quality varies by product.
- 03
Injectable or "research use only" versions are not supplements. That label does not make human use lawful, and injectables fall under medicines rules.
What Melatonin is
A 2013 meta-analysis found a small effect on primary sleep disorders. There is no blood test that sets the dose. Label accuracy is the product story. Not a longevity hormone you can panel into place.
Melatonin is the pineal night signal sold as a sleep capsule. A 2013 meta-analysis of primary sleep disorders reported a statistically significant but small effect on sleep.
Mechanism: Melatonin receptors in the suprachiasmatic nucleus help time circadian sleep propensity. Exogenous melatonin is a timing cue and, at higher doses, a sedating signal.
Regulatory history: Sold as a dietary supplement in the United States. Not approved as a hypnotic drug. Prescription melatonin-receptor agonists are separate medicines.
How FDA treats this kind of product
Approves prescription drugs by indication and polices unapproved products, including peptides sold online. Compounding pharmacies may prepare some compounds under a prescription when the FDA places them on a permitted bulk-substances category.
The classification above is the The Longevity Archive reading of U.S. Food and Drug Administration listings for Melatonin at the reviewed date, not a legal opinion. Rules change, and importing, prescribing and possessing a compound can each be treated differently. Check the regulator directly before acting on anything here.
Melatonin in other countries
Frequently asked questions
Is Melatonin legal in the United States?
Melatonin can be sold in the United States as a supplement or cosmetic ingredient, classified as "Sold as a supplement". That is not drug approval: FDA has not evaluated any health claim, and injectable or "research use only" versions fall outside supplement rules, so that label does not make human use lawful. On the evidence, no human study is cited on its profile.
Can I buy Melatonin in the United States?
Yes, in supplement or cosmetic form. In the United States Melatonin is classified as "Sold as a supplement", so oral, topical or cosmetic products can be sold under supplement rules. Injectable versions and products labeled "research use only" are not supplements and are not approved for human use.
Is Melatonin FDA approved?
No. FDA status: Sold as a dietary supplement in the United States. Not approved as a hypnotic drug. Prescription melatonin-receptor agonists are separate medicines.. Current US classification: "Sold as a supplement". On the evidence, no human study is cited on its profile.
Related compounds in the United States
Full research profile
Mechanism, cited studies, FDA status and the full legal summary for Melatonin live on its compound profile.
Melatonin profileThis page is general information about the regulatory status of Melatonin in the United States, current as of Sep 2026. It is not legal advice, and classifications change; check U.S. Food and Drug Administration directly or consult a lawyer for a specific situation. Educational use only. This database summarizes published research and is not medical advice. Where a dose appears it is a record of what a trial or clinic ran, or what people describe doing, with its source attached. Nothing here is a recommendation for personal use. The Longevity Archive has no vendor relationships and does not recommend where to buy anything.