– Vitamin B2 (Riboflavin) is an essential B-Vitamin used by the body for normal cell respiration. – Each bottle contains 100 Vitamin B-2 100mg tablets. – This product was made without gluten, starch, wheat, yeast, preservatives, and artificial colors or flavors. – Nature's Blend products are manufactured in America from internationally sourced ingredients. Take one tablet per day, or as instructed by your trusted healthcare provider.