Elemental Selenium and Vitamin B2 (riboflavin) are essential for glutathione use and recycling. Selenium is really low in Australian soils, and people are commonly deficient. Signs of low B2 are blood Riboflavin an overview ScienceDirect Topics Riboflavin (Vitamin B2) Vitamin B2 MedChemExpress Riboflavin (vitamin B2) and oxidative stress: a review British Journal of Nutrition Cambridge Core Vitamin B2, or riboflavin, is a necessary nutrient for normal body function, energy production, and cell repair. Read: https: indianexpress.com article lifestyle health vitamin b2 cancer survive oncologist riboflavin study expert 10695429 ?utm_term Figure 1 from Glutathione redox cycle protects cultured endothelial cells against lysis by extracellularly generated hydrogen peroxide. Semantic Scholar