Long post, sorry. GHK-Cu: what actually has human evidence behind it, and what is extrapolation from animals?

Sample size, blinding, and who paid for it. Those three questions kill most of the confidence in most of these threads.

What surprised me is how much of the perceived benefit was routine and attention rather than pharmacology.

I would rather have a narrow conclusion and be right than a broad one and be interesting.

Injection site reactions are trivial until they are not, and a fresh needling technique removes half of them.

The interesting question is not whether it works but for whom and at what cost.