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[2] A 2023 study in the Journal of Cosmetic Dermatology found GHK-Cu and hyaluronic acid combined to synergistically upregulate collagen types I, IV, and VII

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Jan 2012;33(1):199.e1-12

Trend Status: Mature/Growing

Published preclinical data in rodents suggests doses equivalent to 200mg+ in humans produce off-target effects on folate metabolism and S-adenosylmethionine (SAMe) pools