[Bioorganic and Medicinal Chemistry Letters, 2009, vol
PMID 1362956
Oral glutathione administration inhibits the oxidative stress and the inflammatory responses in App NL-G-F/NL-G-F knock-in mice
GHK-Cu is a naturally occurring copper-binding tripeptide that may influence hair follicle size, anagen phase duration, and follicular inflammation, but these effects are based on preclinical data only and have not been confirmed in human trials
It has a very low oral bioavailability, which means that when you take a capsule of glutathione and it reaches your gastrointestinal tract, a large portion of it breaks down before the bloodstream absorbs it, says Seemal R
Additionally, glutathione is an important cofactor for enzymes such as glutathione peroxidases and glutathione-S transferases (Mar et al, 2009)