“…L-cysteine, the immediate glutathione precursor and rate-limiting step in glutathione synthesis, is a one dose fits all approach. 10 , 11 , 43 , 58 As previously documented, the optimal adult L-cysteine daily dosing value is 4,500 mg per day in divided doses. 9 , 51 , 52 , 55 Due to toxicity of methyl mercury to central nervous system, selenium 400 µg per day is added.…”