which is better met tathione or glutathione Amazon.com: Soft Gel Capsules with Algatrium, 60 Count : Health & Household Best Glutathione Supplement | 4

Absolutely and we'd argue GHK-Cu makes your injectable results better

Collagen-derived tripeptides (CTP) have demonstrated vascular-protective properties in preclinical models and early human investigations, where they enhanced endothelial resilience under oxidative stress and attenuated vascular inflammation

doi: 10.1186/s12870-021-03371-1 58 YuJ.HuF.DossaK.WangZ.KeT

Enzyme reactions were quenched by adding 100 l of acetonitrile and centrifuged at 17,000 g for 5 min, before being subjected to 3-NPH derivatization 71

[4] As a research-grade lyophilized peptide, BPC-157 should be handled according to batch-specific supplier documentation, institutional laboratory procedures, and standard peptide-handling practice

Any papers resulting from these two trials do not appear to be indexed in major global databases like PubMed, and its not clear if they were ever published in peer-reviewed journals