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Unlike PRP, which relies on naturally occurring growth factors obtained from blood, GHK-Cu is a naturally occurring peptide complex that interacts with biological signalling pathways

Leiker, T

Expression of human NAT1 has been detected in adult liver, bladder, digestive system, blood cells, placenta, skin, skeletal muscles, gingiva (Dupret & Lima, 2005), mammary tissue, prostate, and lung by a number of methods (Sim et al., 2008)

Once ingested, it is rapidly deacetylated by the body to yield free cysteine, completely bypassing the metabolic bottlenecks that often plague chronically ill patients

Differences in genetic background and environmental factors were proposed as contributing factors