History and Functions of Vitamin B2

Only available on StudyMode
  • Topic: Riboflavin, Metabolism, Cofactor
  • Pages : 3 (994 words )
  • Download(s) : 295
  • Published : July 25, 2012
Open Document
Text Preview
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, tomatoes, yeast, mushrooms, and almonds[3] are good sources of vitamin B2, but exposure to light destroys riboflavin. The name "riboflavin" comes from "ribose" (the sugar whose reduced form, ribitol, forms part of its structure) and "flavin", the ring-moiety which imparts the yellow color to the oxidized molecule (from Latin flavus, "yellow"). The reduced form, which occurs in metabolism along with the oxidized form, is colorless. Riboflavin is best known visually as the vitamin which imparts the orange color to solid B-vitamin preparations, the yellow color to vitamin supplement solutions, and the unusual fluorescent-yellow color to the urine of persons who supplement with high-dose B-complex preparations requirement for adult men and women are 1.1 mg and 0.9 mg, respectively. Recommendations for daily riboflavin intake increase with pregnancy and lactation to 1.4 mg and 1.6 mg, respectively (1in advanced). For infants, the RDA is 0.3-0.4 mg/day and for children it is 0.6-0.9 mg/day.[9] Riboflavin deficiency

Further information: Ariboflavinosis
Riboflavin is continuously excreted in the urine of healthy individuals,[10] making deficiency relatively common when dietary intake is insufficient. However, riboflavin deficiency is always accompanied by deficiency of other vitamins.[10] A deficiency of riboflavin can be primary - poor vitamin sources in one's daily diet - or secondary,...
tracking img