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Plasma Concentration: From ~200 ng/mL to ~80 ng/mL Research measuring GHK-Cu across different age groups has found plasma concentrations of roughly 200 ng/mL around age 20, falling to approximately 80 ng/mL by age 60 a decline of more than 50% over four decades

Urine organic acids were abnormal in the majority in which it was tested with elevations in TCAC metabolites, specifically elevations in citrate and/or isocitrate representing the majority of the abnormalities

Most providers have family medicine or internal medicine backgrounds with additional obesity medicine training