riboflavin
(rī‵bō-flā'vĭn 
)
C17H20N4O6; a water-soluble vitamin of the B complex group. It is an orange-yellow crystalline powder. Symptoms of riboflavin deficiency are photophobia, cheilosis, glossitis, and seborrheic dermatitis, esp. of the face and scalp. SYN: vitamin B2.
Function: Riboflavin is a constituent of certain flavoproteins that function as coenzymes in cellular oxidation. It is essential for tissue repair.
Sources: Riboflavin is found in milk and milk products, leafy green vegetables, liver, beef, fish, and dry yeast. It is also synthesized by bacteria in the body.
Daily Requirement: Adults require 0.6 mg/1000 kcal of food intake. Infants, children, and pregnant and lactating women require increased amounts.