what does ghk-cu stand for “Is actually worth it?” is genuinely one of the most common questions in my comments, so let me finally answer it properly., The short version: copper peptides have real research behind them, GHK-CU Peptide Dosage Chart: Complete

[24] Deficiency [edit] Vitamin B 12 deficiency can potentially cause severe and irreversible damage, especially to the brain and nervous system

GHK-Cu (Glycyl-L-Histidyl-L-Lysine) is a tri-peptide that occurs naturally in human plasma

GLP-1/GIP receptor agonism versus NNMT enzyme inhibition

Combine resistance training and aerobic activitypreclinical data suggest synergy with exercise [10]

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However, the lethal dose of GHK-Cu peptide is very high around 21,000 mg for a 70kg human (or about 330 mg/kg) [13]