Is KLOW blend legal in the United States?

KLOW is a seller's mix of four peptides in one vial, usually 50 mg GHK-Cu plus 10 mg each of KPV, BPC-157 and TB-500. It is sold for healing and inflammation. No study has tested the mix in any animal or person. GHK-Cu is 62.5% of the powder, so the vial holds about 7.9 mg of copper. Anyone dosing KLOW by units is mostly dosing a copper peptide.

KLOW is one of the most widely stocked gray market products of 2026. It puts four peptides in one vial.

How it works: Assumed to be the four parts added together, and assumed is the key word. GHK-Cu carries copper into tissue.

Approval history: Not approved, and the combination has never been evaluated by any regulator. FDA staff evaluated BPC-157 for the July 2026 Pharmacy Compounding Advisory Committee and found no adequate human data along with mislabelled products in the market.

Approves prescription drugs, each for a named use. It also acts against unapproved products, including peptides sold online. Compounding pharmacies, which mix drugs to order, may make some compounds with a prescription. That only applies when the FDA puts the compound in a category of bulk ingredients it allows.

The legal category above is how The Longevity Archive reads U.S. Food and Drug Administration listings for KLOW blend on the reviewed date. It is not a legal opinion. Rules change. Bringing a compound into the country, prescribing it and owning it can each be treated differently. Check with the agency before you act on anything here.

Check FDA directly

Whether KLOW blend is banned in sport is set by the World Anti-Doping Code and by military rules, not by its legal status in the United States. Before you compete or get tested, look up KLOW blend 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.