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Description
Injectable GHK-Cu remains available as a research chemical

Brager MA, Patterson MJ, Connolly JF, Nevo Z

The resolution of lung injury by vitamin B 12 may be associated with its reduced glutathione-sparing effect to maintain the antioxidant status, as well as its role as a regulator of NFB levels affecting the expression of genes encoding pro-inflammatory cytokines

Genetic variants are part of the susceptibility
