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In fact, a recent study as well as other studies have confirmed a lack of standardization with supplement manufacturers

GHK-Cu is sold as a research compound and is not FDA-approved for human use

It protects skin cells from damage, reducing wrinkles, fine lines, and dullness

Investigated various glutathione derivatives in vitro and found that certain forms (e.g., GSHMEE) effectively reduce melanin and tyrosinase activity, increasing the pheomelanin/eumelanin ratio

At 8 mg and 12 mg, the results were dramatic, with the highest dose producing an average 24.2% body weight reduction over 48 weeks

These results were consistent across intraperitoneal and local administration 3