The mechanistic picture that the literature does support, copper delivery to and from higher-affinity acceptors and to copper-requiring enzymes, implies the metal is doing much of the work and the peptide is determining where and how readily it goes
Gorouhi, F
The Month 2 dose increase is data-driven, not arbitrary
doi:10.1016/j.nbt.2012.05.024 Musatti A, Devesa V, Calatayud M, Vlez D, Manzoni M, Rollini M (2014) Glutathione-enriched bakers yeast: production, bioaccessibility and intestinal transport assays
15 Our study results differed from those of these studies, as glutathione supplement appeared in our investigation to have no significant positive effects on sun-exposed skin
A peptide is simply a short chain of amino acids