does ghk cu tan you GHK-cu tan? : r/BiohackingU GHK-Cu for Skin: SIGNAL's Guide
Description
The difference is that your window of use is much wider, and the margin for error is far more generous

Geographic variations of the International Diabetes Federation and the National Cholesterol Education Program-Adult Treatment Panel III definitions of the metabolic syndrome in nondiabetic subjects

Red flags include suspiciously cheap prices, absence of COA documentation, unclear peptide sequence or synthesis method information, poor storage conditions during shipping, and vendors without established reputation or reviews
The science behind these is mixed