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Copper Peptide (GHK-Cu) Serum for Firmness, Repair & Hydration Formulated with 2% GHK-Cu, a powerful copper peptide complex, this advanced skincare serum helps target visible signs of aging by improving firmness, elasticity, and hydration
Some people react very badly to methyl - can cause high anxiety - and its much more expensive and much less stable than cyanocobalamin
doi:10.18632/oncotarget.11168 Ma WH, Li M, Ma HF, et al
Formal Analysis, Validation C.-J.P
It contains a cyanide molecule, which is replaced by a methyl or adenosyl group in the body, allowing it to convert into an active form of B12
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