ghk-cu safe dosage clinical studies Peptides Before and After: Dosage, Benefits & How It Works for Skin and Hair GHK-Cu - Peptide for Collagen,
Description
Claims that no side effects occur come mostly from the peptides inventors rather than independent investigators

Front Neurosci 2018;12:49

The HSP70 chaperone machinery: j proteins as drivers of functional specificity

I still get the occasional numbness with stinging and burning in my legs
