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Description
Tohoku J
One study found that a 2% concentration of a glutathione cream improved the melanin index (a measure of melanin in skin) on dark spots when used twice a day for 10 weeks
The standard GHK-Cu (copper tripeptide-1) dose is 1 to 2 mg subcutaneously once daily, five days per week, in cycles of 4 to 12 weeks
doi: 10.1159/000124200
