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As a naturally occurring compound present in human plasma from birth, GHK-Cu has an inherent level of biological compatibility

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Aging Pathobiology and Therapeutics, 2019, 1(1): 05-09

(2019, PMID 30915550) , and it is worth noting that essentially all of that evidence is preclinical our breakdown of BPC-157's FDA approval status and the parallel TB-500 regulatory picture cover why neither compound has cleared the approval pathway

This endogenous production makes glutathione a critical line of defense against oxidative stress, a harmful condition caused by an imbalance between free radicals and antioxidants in the body