Riboflavin: The Health Benefits of a Forgotten Natural Vitamin 10.4: Riboflavin Medicine LibreTexts Vitamin: Metabolism, Functions, Analytical Methods & Applications 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 Glutathione: Master Antioxidant, Reducing Oxidative Stress, and Detoxification The Krebs cycle is the central engine of cellular energy metabolism. It's where your body gets most of its energy from food. If you are low in any of these B vitamins,