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Description
The mechanism is effectively identical

Published safety observations Published clinical studies involving topical GHK-Cu have generally reported favourable local tolerability

Yes, it is possible to have normal B12 levels within the vitamin B12 range and still be deficient

doi: 10.1016/bs.mie.2021.11.023

Clinical And Experimental Pharmacology & Physiology

If your symptoms get better and your blood tests look good, it means the treatment is effective
