glutathione gsh stands for Structure of reduced (GSH) . Glutathione (L- g Glutathione: a very efficient antioxidant.
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This superior performance comes without the irritation, peeling, and sun sensitivity that accompany retinoid use

R., Ersland, L., Hugdahl, K

The Benefits of BPC-157 Peptides and How to Use Them Peptides are short-chain amino acids that are made up of 2 to 50 amino acids
Lymphocyte proliferation modulated by glutamine: involved in the endogenous redox reaction

PMID: 20564073

This indicates that oxidative stress is a crucial mechanism in the therapeutic action of these agents