Riboflavin (vitamin B2) is a water-soluble vitamin. Your body uses it for energy production, cell function, and metabolism. You can get it from dairy, eggs, and green vegetables. It is often included in B-complex supplements.
People take riboflavin to help keep energy levels steady and support healthy skin, eyes, and nerves. Some use it under medical guidance for migraine prevention.
Take it with a meal to aid absorption. Typical doses cause no major side effects. Very high doses might turn urine bright yellow, which is harmless.