Riboflavin is a/an

Riboflavin, also known as vitamin B2, is one of the eight B-complex vitamins. It is a watersoluble vitamin that functions as a coenzyme, meaning that it is required for enzymes (proteins) to perform normal physiological actions. Riboflavin is found in milk, cheese, eggs, leaf vegetables, liver, kidneys, legumes, mushrooms, and almonds.