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Age-Related GHK-Cu Decline and the Case for Supplementation GHK-Cu is naturally present in human plasma at approximately 200 ng/mL in young adults, declining to approximately 80 ng/mL by age 60 a 60% reduction that correlates temporally with the visible signs of skin aging
Knop FK, Aroda VR, do Vale RD, et al
Most importantly, inquire about realistic outcomes based on your current B12 status rather than accepting blanket performance enhancement claims
Fate of superoxide dismutase in mice following oral route of administration
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