It appears to have a regulatory effect on circadian rhythms and stress responses
Lamalice L, Le Boeuf F, Huot J
Proinflammatory cytokines TNF- and IL1- activate the canonical NF-B pathway that induce the gene expression of cyclooxigenase-2, inducible nitric oxide synthase-3, inflammatory cytokines, and matrix metalloproteinases [75] These changes lead to the damage of TJs, decreased endothelial integrity and increased permeability at the BBB [73, 76], and to neuroinflammation and the development of chronic neurodegenerative diseases such as AD [10, 77]
Abdul-Hassan MahdiSAbdul-AzizAA
A randomized, double-blind, placebo-controlled trial published in the European Journal of Nutrition found that daily oral glutathione supplementation at 1,000 mg for six months increased glutathione levels by 30 to 35% in erythrocytes, plasma, and lymphocytes among 54 healthy adults