Glutathione was discovered at the turn of the 20 th Century, but it wasnt until 1984 that its metabolism in the body began to be thoroughly studied
Specifically, excessive intracellular copper is chelated by two main antioxidant peptides: glutathione (GSH) and MTs (Shishido et al., 2001
Their exceptional chemical stability allows environmental persistence exceeding two decades, leading to progressive bioaccumulation through food webs and preferential storage in lipid-rich tissues ( Human exposure to these compounds occurs through multiple pathwaysingestion, inhalation, and dermal absorptionwith subsequent accumulation in adipose tissue, hepatic systems, and critically, reproductive organs ( 1.2 Key research challenges Despite substantial advances in understanding individual EED toxicity profiles, several fundamental knowledge gaps continue to impede comprehensive risk assessment: Complex Mixture Effects Remain Poorly Understood While toxicological studies have extensively characterized individual EED effects, real-world human exposure invariably involves simultaneous contact with multiple compounds
72 , 81 , 82 Thus, the concentration of vitamin C in the lens was increased with dietary supplements beyond levels achieved in persons who already consumed more than two times the recommended daily allowance (60 mg/day) for vitamin C
Serine is the major substrate driving folate cycle flux for the generation of cytoplasmic NADPH by the enzyme ALDH1L1 ( + ] is through increasing the rate of glutaminolysis (Figure 2E)
