Riboflavin, also known as vitamin B2 is an easily absorbed micronutrient with a key role in maintaining health in humans and animals. It is the central component of the cofactors FAD and FMN, and is therefore required by all flavoproteins. As such, vitamin B2 is required for a wide variety of cellular processes. It plays a key role in energy metabolism, and for the metabolism of fats, ketone bodies, carbohydrates, and proteins. It is also used as an orange-red food colour additive, designated in Europe as the E number E101,[2]
Milk, cheese, leaf vegetables, liver, kidneys, legumes, yeast, mushrooms, and almonds[3] are good sources of vitamin B2, but exposure to light destroys riboflavin.