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Clinical study results: what the research shows Marketing claims often exaggerate ingredient benefits, but GHK-Cu has accumulated substantial clinical evidence supporting its wrinkle-reducing effects
Circulating levels decline with age, from roughly 200 ng/mL at age 20 to about 80 ng/mL by 60

Only the good stuff inside each softgel, no shellfish, eggs, gluten, soy, corn, sugar or peanuts

Proceedings of the Nutrition Society , 59(4), 595600
