US$ 29.35
glutathione oxidizing agent ʟ-Glutathione oxidized disodium salt, 1 X 250 mg (G2140-250MG) Glutathione-Related Enzymes and Proteins: A
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[DOI] [PMC free article] [PubMed] [Google Scholar] 18.de Jong L.M., Jiskoot W., Swen J.J., Manson M.L

Changes in blood ROS, e-NO, and some pro-inflammatory mediators in bronchial secretions following erdosteine or placebo: a controlled study in current smokers with mild COPD

Exp Ther Med 11(2):674682

The symptoms more likely reflect medication intolerance requiring dose adjustment and supportive care rather than vitamin supplementation
