Is TB-500 legal in United States?

TB-500 is among the peptides readers most often ask about in United States. This page focuses on the regulatory reality there, not on how to obtain or use it, because that is where reliable, localized information is hardest to find.

In United States, TB-500 has no marketing authorisation and is not an approved medicine anywhere in the world. It circulates online as a “research chemical” or “not for human use” product. That label does not make human use lawful or safe.

Importing TB-500 into United States, including for personal use, is restricted, because it is an unauthorised medicine; customs may detain shipments. A “for research use only” label does not legalise import for human use. Personal possession of TB-500 in United States sits in a grey area: it is not a scheduled controlled substance, so simple possession is generally not a drug-scheduling offence, but it is an unauthorised medicine and enforcement targets sale and supply.

In the US, ipamorelin is not an FDA-approved drug. Its status for pharmacy compounding under section 503A has been contested and is evolving (the bulk-substance nomination history through 2024 and a 2026 federal easing of earlier restrictions). Verify the current FDA position. Either way, it remains unapproved as a medicine.

TB-500 is named on the WADA Prohibited List as a growth-hormone secretagogue (section S2), so it is banned in sport at all times for competing athletes. That is an independent reason for caution regardless of local medicines law.

Selling or supplying TB-500 without the required authorisation is an offence in United States. FDA (U.S. Food and Drug Administration) sets out the applicable sanctions; we do not reproduce specific figures here because they change. Confirm the current penalties with the regulator. This page reflects our reading of the position as of the last-verified date; regulations change, so confirm with FDA (U.S. Food and Drug Administration) before making any decision.