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Research on GHK-Cu for skin in women (including both clinical trials measuring skin density and dermatological studies on photoaging) consistently show meaningful results at the 12 mg/day injectable dose range or equivalent topical coverage
Most people do 250-500mcg twice daily
It is derived from a protective protein naturally found in human gastric juice
they are what people inject
Contrarily, in a shorter placebo-controlled study with healthy individuals, daily supplementation of 50 mg ( n = 32) or 100 mg ( n = 33) riboflavin showed no reduction in free thiols compared to placebo ( n = 34) 53
Dysesthesia An abnormal skin sensation
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