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But its expensive ($150-300+ per session), requires ongoing clinic visits (1-3x/week), and has a half-life of only about 14 minutes

This principle applies to both direct injections and a whitening drip, since both delivery methods work through the bloodstream at a comparable pace

But for women in perimenopause, the GHK decline compounds the estrogen-related changes you are losing repair signaling on two fronts at once

The one human trial that will measure tolerability directly has not started reporting it is only recruiting (planned 2026), studies a topical gel on small standardized wounds , and lists safety as a secondary, not primary, outcome (NCT07437586)