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Heads up: Sometimes the plunger pushes itself in as soon as the needle enters the vial
GHK-Cu does not simply tell fibroblasts to make more collagen
It is a valuable ingredient in scalp serums, hair tonics, and conditioning treatments targeting thinning or fine hair
Visible changes in skin firmness and hair density build over weeks, not days
Injectable GHK-Cu remains available through research chemical suppliers
It was first described in the scientific literature in 1993 by Sikiri and colleagues
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