The temporary blue discoloration some users experience isn't hyperpigmentation but surface staining from copper ions, which washes off easily
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That means limiting alcohol consumption and reducing exposure to persistent organic pollutants (POPs), which are found in concentrated levels in conventionally grown foods 1
Skin quality: In addition to wound healing properties that can act on the skin, GHK-Cu may provide numerous other benefits for the skin which is why it is a popular ingredient in anti-aging creams and other skin care products
The Cosmetic Ingredient Review (CIR) Expert Panel evaluated it (along with 22 other acryloyldimethyltaurate polymers) and concluded it's: Due to its large molecular size, it sits on the surface of skin rather than penetrating it
You can easily obtain Vitamin C through diet, an oral supplement, or skincare products