Papers referenced int the video:

Deficient synthesis of glutathione underlies oxidative stress in aging and.
can be corrected by dietary cysteine and glycine supplementation:
https://pubmed.ncbi.nlm.nih.gov/21795440/

Glycine and N-acetylcysteine (GlyNAC) supplementation in older adults improves glutathione deficiency, oxidative stress, mitochondrial dysfunction, inflammation, insulin resistance, endothelial dysfunction, genotoxicity, muscle strength, and cognition: Results of a pilot clinical trial:
https://pubmed.ncbi.nlm.nih.gov/33783984/

Glutathione declines during aging (Age-related changes in the glutathione redox system):
https://pubmed.ncbi.nlm.nih.gov/11835271/