Nutricost Vitamin B2 Riboflavin 400mg was created to provide an alternative to drastic dietary changes, while helping build the body's store of riboflavin (B2). It is a necessary vitamin in converting food into fuel. B2 deficiency can have serious consequences if left unchecked. Symptoms of deficiency are fatigue, slowed metabolism, light sensitivity, swollen throat, digestive problems, slowed growth and cracks and sores around the mouth. These B2 400mg tablets are third-party tested and are made in a GMP-compliant, FDA-registered facility for added safety. They are available in a bottle of 120 capsules, so they will last for a while. Nutricost Vitamin B2 Riboflavin 400mg is also a non-GMO product and is gluten-free, allowing those that have certain dietary restrictions the ability to maintain riboflavin levels easily. Each capsule contains a potent 400mg to help give the body the nutrients that it needs.