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Why these four peptides, in this ratio The 5:1:1:1 mass ratio (GHK-Cu 50 mg to 10 mg each of the other three) is not arbitrary

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Both the B12 injections and Lipotropic injections contain vitamin B12

Research design questions about combining compounds across mechanisms are outside the scope of supplier guidance

Nevertheless, use of metformin may decrease vitamin B 12 status: a meta-analysis of four short-term intervention trials (up to 4 months duration) in patients with type 2 diabetes found that metformin use decreased serum cobalamin concentrations by 57 pmol/L, which could have clinical implications if such patients have suboptimal vitamin B 12 status (146)