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A faint blue-green tint at the injection site is sometimes reported and is associated with the copper in GHK-Cu (cosmetic only)

Hallbk T, Lundgren J, Rosn I

Different factors such as age and diet may significantly decrease its production over time

Glutathion wird in der Leber gebildet und ist dort in hoher Konzentration vorhanden

For Overall Skin Health & Hydration: Creams and lower-concentration serums are excellent daily options for general skin health and hydration, such as the GHK-Cu Copper Peptide Facial Cream which provides moisturizing and nourishing benefits

The "safer" option depends on which specific side effects are most concerning to you and your individual risk factors