Still tired even after sleeping? Cracks at the corner of your mouth? Your body might be screaming for Vitamin B2 Most people ignore this until the signs get obvious. Vitamin 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 Dietary riboflavin (vitamin B2) intake and osteoporosis in U.S. female adults: unveiling of association and exploration of potential molecular mechanisms Nutrition Journal Springer Nature Link Vitamin B2 (Riboflavin) As An Enzyme Cofactor Diet and Nutrition Series