Riboflavin No. 16843 Dietary supplement essential for the production of energy Riboflavin works with two important enzymes (FMN and FAD) involved in energy production. Riboflavin is also required for antioxidant enzyme defense mechanisms. Riboflavin deficiency is generally characterized by cracking of the lips and corners of the mouth; an inflamed tongue; visual disturbances such as sensitivity to light and loss of visual acuity; cataract formation; burning and itching of the eyes, lips, mouth and tongue; and other mucous-membrane disturbances. 30 tablets Amount per tablet Vitamin B2 (Riboflavin) 400 mg Other ingredients: Stearic acid, cellulose, cellulose gum, silicon dioxide, and magnesium stearate. Recommendations: One tablet daily. Contains no sugar, yeast, wheat, gluten, corn, soy, dairy products, artificial coloring, artificial flavoring, or preservatives.