how many peptide bonds are present in glutathione 4: Primary structure of (a) (GSH) with clarification on its Glutathione system enhancement for cardiac
Description
doi: 10.1038/srep06328

One theoretical consideration is that both compounds may influence gastrointestinal function

For example, the sub-cutaneous injection study in cats showed measurable increases in delta wave sleep
The authors realized that glutamate, glycine and serine were consistently impacted by metabolic disease and developed the GSG-Index, Glutamate/ (Serine+Glycine)

GHK-Cu peptides are scientifically supported for skin repair and collagen production