amino acids forming glutathione Biochemistry | Glutathione Synthesis Enzymes The Glutathione System: A Journey
Description
It has become a popular term implying health benefits (which are not supported scientifically), so some brands that have a pH in the 7s use it as well for marketing purposes

2023, doi: 10.1016/S2213-8587(23)00122-1

(PubMed) Ferrante KL, Shefner J, Zhang H, et al

Collectively, these findings indicate that chronic mercury exposure disrupts essential gene regulatory pathways, leading to inflammation, oxidative stress, and hypoxia factors that collectively contribute to lung tissue damage

reduces wrinkles and pigmentation

These differences point to dose-dependency, where 500 mg seems to work better than lower doses
