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GHK-Cu, a copper tripeptide naturally occurring in human plasma, has emerged as one of the most promising peptides for hair growth

Speaking about peptides specifically, he said the agency will need to review them to determine which are harmless and which require additional study

Tesamorelins pivotal trials tested reduction of excess visceral (abdominal) fat in people with HIV-associated lipodystrophy, and that is its FDA-approved indication

However, for specific injuries (like a damaged nerve in the leg), many researchers prefer administering it near the site to maximize local concentration, though the science supports its efficacy via systemic absorption as well