liposomal glutathione protects from degradation Pure Encapsulations - Immune Support & Liver Detox* - Antioxidant Protection - with Setria Glutathione - Non-GMO Liposomal Glutathione – Harmony Health

The combination of a defined small peptide sequence with a specific copper coordination chemistry makes GHK-Cu unusual among research peptides it is as much a coordination compound as it is a peptide, and most of its biology depends on the copper that the peptide carries

10.1038/s41598-017-12236-3 378 WangY.VachonE.ZhangJ.CherepanovV.KrugerJ.LiJ.et al (2005)

Choosing suppliers with transparent product information, available COAs, and responsive technical support reduces experimental risk related to purity, delivery, and batch consistency

Firmer, more even-looking skin after each use

This may help it interact better with cell membranes and become more stable in research use