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Description
Why is a lack of B12 of such concern
Nature 596 , 276280 (2021)
Effects of creams containing vitamin C, a copper-binding peptide cream and melatonin compared with tretinoin on the ultrastructure of normal skin-A pilot clinical, histologic, and ultrastructural study

Copperbinding peptides like GHKCu and related complexes can act as antioxidants or SOD mimetics in skin models, helping to reduce oxidative damage in local tissues