The challenge is not whether GHK-Cu has biological activity (that is well-established) but whether that activity can be delivered to tissues at concentrations and durations sufficient to produce clinical effects beyond the skin surface
In a 2007 lab study, scientists grew human hair follicles and the dermal papilla cells, or "boss" cells, that control their growth, in dishes
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But that would, would be the most interesting longevity study I've seen done, if accurate, if true, because he was able to take nursing home patients, give them peptides for, you know, very small amount of the Year, and yet they accrue benefits the rest of the year
Do not freeze the vials, as freezing and thawing could potentially precipitate ingredients or compromise the integrity of the container