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Pathological causes of elevated B12 warrant careful consideration: Haematological disorders : Myeloproliferative neoplasms (polycythaemia vera, chronic myeloid leukaemia), acute leukaemia, and lymphoproliferative disorders can increase B12-binding proteins (transcobalamin and haptocorrin), elevating total serum B12 [3] Liver disease : Hepatocellular damage releases stored B12 into circulation

For that reason, compare the total contents with your injection schedule rather than judging value by vial count alone

But its not recommended for beginners

How GHK-Cu Compares to Retinoids, Vitamin C, and Other Anti-Aging Ingredients The 1998 head-to-head trial by Abdulghani measured procollagen synthesis side by side, and the copper-binding peptide outperformed both vitamin C and tretinoin