As a topical , GHK-Cu usage directions may vary depending on the specific product, but in general terms, its applied directly to the target area of skin (e.g., the face in the case of acne)
If what you want is a cosmetic product for occasional, localized skin concerns, then a topical fits the bill
A triple-threat in detoxification: the glutathione S-transferases
GHK-Cu is a naturally occurring copper-binding peptide found in human plasma, saliva, and urine
For the polypeptide synthesis all the chemicals were used directly as the products received from the vendors
L-ascorbic acid (the most potent form of topical vitamin C) requires a low pH, typically around 2.5 to 3.5, to remain stable and penetrate the skin