Riboflavin, also known as vitamin B2, is necessary for the body to be able to activate vitamin B6.* Riboflavin is also necessary for the body's conversion of tryptophan to niacin, and the conversion of folate to folate's various active forms.* In addition, riboflavin plays a crucial role in the metabolism of fats and glucose, the synthesis of red blood cells, healthy methylation, and the production and regulation of certain hormones.*To be utilized by the body, however, riboflavin must first be converted to its active form – riboflavin 5'-phospate (R5P). A compromised digestive system can adversely affect the body's ability to convert riboflavin to R5P.* And certain prescription medications can also compromise the absorption of riboflavin, putting it in a state of deficiency. Thorne's Riboflavin 5'-Phosphate, which is not derived from yeast, provides supplementation with a bioactive, tissue ready form of riboflavin that can be optimally utilized in the body.* *These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease. Ingredients Vitamin B2 (Riboflavin 5'-Phosphate Sodium) 36.5mg Other Ingredients: Calcium Laurate, Hypromellose Capsule, Microcrystalline Cellulose, Silicon Dioxide Usage Take 1 capsule one to three times daily or as recommended by your health professional. This product is contraindicated in an individual with a history of hypersensitivity to any of its ingredients.If pregnant, consult your health professional before using this product. Size 60 capsules