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Skin improvements from GHK-Cu tend to develop more gradually, with noticeable changes in firmness and texture typically appearing around weeks 4 to 8
Kenche H, Singh M, Smith J, Shen K
It is widely cited in pre-clinical research on GHS-receptor binding selectivity and growth-hormone secretion models
Whether this specific formula, at whatever dose is in the capsule, produces a noticeable effect for you individually isn't something any outside source can verify in advance
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