Vitamin B2, or riboflavin is an essential water-soluble vitamin that is important for many processes in the body. Vitamin B2 deficiency is not common, but certain groups could be at risk. Also, vitamin B2 is better absorbed from whole foods when compared to supplements. Therefore, it is important to understand the health benefits of vitamin B2, which foods to eat more, and also to recognize the symptoms of riboflavin deficiency.