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Plasma concentrations of GHK-Cu are relatively high in young adults (approximately 200 ng/mL) and decline significantly with age, dropping to around 80 ng/mL by age 60
I went through physiotherapy twice
Your body levels of GHK-Cu drop with age (from 200 ng/mL in youth to 80 ng/mL by age 60), so supplementing mimics youthful repair
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Molecules 26(7):1887
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