side effects of topical ghk cu “Is GHK-Cu actually worth it?” is genuinely one the most common questions in my comments, so let me finally answer it properly., The short version: copper peptides have real research behind them, Copper Peptide & GHK-Cu Side
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No pharmaceutical company has filed an IND application for TB-500 as a therapeutic agent

Gut health - For vitamin B12 to be absorbed effectively, it needs to bind with a protein called intrinsic factor, which is produced in the stomach
Improved glucose control: Targeting GLP-1 and GIP receptors, retatrutide demonstrates promising results in improving insulin sensitivity and glucose regulation

doi: 10.1152/ajpgi.00496.2010

84 MillerEJ

thus, peptide hormones do not accumulate in tissues [1,2]