Riboflavin
![](/Images/godic/202502/07/Riboflavin.svg4719.png")
![A solution of riboflavin.](/Images/godic/202502/07/Riboflavin_solution4719.jpg")
![Fluorescent spectra of riboflavin](/Images/godic/202502/07/Riboflavinspectra4720.jpg")
![A solution of riboflavin in water (right) is yellow with chartreuse fluorescence under fluorescent room lighting. The beaker prepared at left holds a detergent in water, forming micelles that will show the passage of a visible laser beam.](/Images/godic/202502/07/RiboflavinSolution4720.jpg")
Riboflavin (vitamin B2) is part of the vitamin B group. It is the central component of the cofactors FAD and FMN and as such required for a variety of flavoprotein enzyme reactions including activation of other vitamins. It was formerly known as vitamin G.