Upton, J.H., Hannen, R.F., Bahta, A.W., Farjo, N., Farjo, B
Taken orally, glutathione has inherently low bioavailability as it faces two key obstacles: the strong acidity of gastric juices and the action of a liver enzyme called gamma-glutamyltranspeptidase (GGT) which catalyses the first stage of its breakdown (8)
doi: 10.3390/ijms21186683 21 VancolenSSbireGRobaireB
GHK-Cu activates TGF-beta superfamily signaling and bone morphogenetic protein (BMP) pathways, promoting tissue remodeling and repair
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Even with safety monitoring systems like the UKs Medicines and Healthcare products Regulatory Agency (MHRA) logging hundreds of reported cases over time, no direct causal relationship has been confirmed