ghk cu tolerance desensitization downregulation effectiveness over time Biological efficacy of GHK-Cu after ionic-liquid loading. (a) Cellular The Effect of the Human
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doi:10.4103/aja.aja_42_19

Attributing the result to GHK-Cu alone isn't science, it's wishful accounting

Therapeutic advances in endocrinology and metabolism, 3(6), 181187

These processes are important to normal tissue function
