Is Leptin legal?
Written by Aaron CuhaReviewed Sep 2026
- US: FDA-approved, prescription only
- UK: Prescription only; check current MHRA status
- AU: Prescription only; check current TGA status
- CA: Health Canada approved, prescription only
The US comes first because most people ask about it. Each country has its own page. It names the agency, the law or rule, and what the legal category means in real life.
All four countries, side by side
| What we list | United States · FDA | United Kingdom · MHRA | Australia · TGA | Canada · Health Canada |
|---|---|---|---|---|
| Status | Approved | Prescription route | Prescription route | Approved |
| Legal category | FDA-approved, prescription only | Prescription only; check current MHRA status | Prescription only; check current TGA status | Health Canada approved, prescription only |
| Note | Myalept, for generalised lipodystrophy only, handed out only through the MYALEPT REMS safety programme. Not for use in obesity, partial lipodystrophy, HIV-related lipodystrophy or liver disease. | Myalepta was approved for sale in the EU on 30 July 2018 (EMA, as a medicine for a rare disease). We did not check the current MHRA listing live for this review. | We could not reach the TGA database for this review, so we could not confirm whether metreleptin is registered in Australia. | Myalepta, Chiesi, Drug Identification Numbers (DINs) 02544555, 02544563 and 02544571. On the market since 2024. Schedule D (a biologic, a drug made from living cells). |
| Agency | Check FDA directly | Check MHRA directly | Check TGA directly | Check Health Canada directly |
US FDA status: Metreleptin (Myalept) was FDA-approved on 24 February 2014 (BLA 125390, Chiesi). It is used alongside diet to treat problems caused by too little leptin in people with generalised lipodystrophy, a rare condition where the body cannot store fat normally, whether they were born with it or got it later. Listed as Prescription in the FDA drug database (Drugs@FDA) on 11 September 2026. It carries the FDA's strongest (boxed) warning, for antibodies that block metreleptin and for T-cell lymphoma, a blood cancer. It is only handed out through a restricted safety programme (REMS). It is not for use in obesity. Natural leptin is not a product.. Reviewed Sep 2026.
Country by country
Is Leptin legal in the United States?
Yes. Leptin is an approved medicine in the United States. Its legal category is "FDA-approved, prescription only". The approval covers the use on its label. It is given out on prescription, not sold over the counter. Products labeled "research use only" are not covered by that approval, and that label does not make them legal to use in people. On the evidence, 6 completed human trials are cited on its profile.
The full United States answerIs Leptin legal in the United Kingdom?
Leptin is available in the United Kingdom only through a prescriber. Its legal category is "Prescription only; check current MHRA status". It is not sold over the counter. Using it rests on the prescriber's judgment, not on an approval to sell it. Vials sold "for research use only" fall outside that route, and the label does not make them legal to use in people. On the evidence, 6 completed human trials are cited on its profile.
The full United Kingdom answerIs Leptin legal in Australia?
Leptin is available in Australia only through a prescriber. Its legal category is "Prescription only; check current TGA status". It is not sold over the counter. Using it rests on the prescriber's judgment, not on an approval to sell it. Vials sold "for research use only" fall outside that route, and the label does not make them legal to use in people. On the evidence, 6 completed human trials are cited on its profile.
The full Australia answerIs Leptin legal in Canada?
Yes. Leptin is an approved medicine in Canada. Its legal category is "Health Canada approved, prescription only". The approval covers the use on its label. It is given out on prescription, not sold over the counter. Products labeled "research use only" are not covered by that approval, and that label does not make them legal to use in people. On the evidence, 6 completed human trials are cited on its profile.
The full Canada answerLeptin in sport and the military
Whether Leptin is banned in sport is set by the World Anti-Doping Code and by military rules, not by its legal status. Before you compete or get tested, look up Leptin by name on the Prohibited List, or look up a named product in Global DRO. Under the World Anti-Doping Code, category S0 bans, at all times, any drug-like substance that meets two tests. No other section of the List covers it. And no government health regulator anywhere has a current approval for it as a treatment in people. Many substances that are approved somewhere are banned by name in another section. So approval does not mean a substance is allowed in sport.
- WADA Prohibited List
- Global DRO (check a named product)
- USADA (US athletes)
- Operation Supplement Safety (US service members)
The rules you compete or serve under decide this, not this page.
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General information, current as of Sep 2026. Not legal advice. Legal status changes. For your own situation, check with the agency or a lawyer. 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. Sellers named on the price pages are ranked by certificate tier, then price, and any affiliate income is disclosed there. Naming a seller is not a recommendation to buy or use anything.