Loren Pickart, who identified GHK in 1973, published gene-expression analyses suggesting GHK modulates a large number of human genes
However, their activity consumes significant amounts of NAD + , leading to a depletion of cellular NAD + levels and impacting energy metabolism and cell survival 58
Conclusion This systematic review and meta-analysis indicate that sublingual and oral vitamin B12 administration provide efficacy comparable to intramuscular injection in improving serum cobalamin levels and reducing hyperhomocysteinaemia
Chem Eng J, 2021, 408: 127245 Yang K, Zhao S, Li B, et al
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