Riboflavin (B2)

Riboflavin is important in the breakdown of carbohydrates, fats and proteins, and, like thiamine, it acts as a coenzyme in the process. It is also significant in the maintenance of the skin and mucous membranes, the cornea of the eye and for nerve sheaths. Riboflavin also acts as a coenzyme for oxidation-reduction reactions throughout the body. Oxidation reduction reactions involve the addition of either oxygen or hydrogen to a substance. One important consequence of this process is when it acts to inhibit chemical reactions with oxygen or highly reactive free radicals. These oxidation reactions can cause damage to our cells.

A deficiency of riboflavin can cause skin disorders (seborrheic dermatitis) and inflammation of the soft tissue lining around the mouth and nose, anemia, and can cause the eyes to be light-sensitive. In the mouth, angular cheilosis can develop. This is a painful condition where lesions develop at the corners of your lips, and glossitis (inflammation of the tongue) can also occur.

Riboflavin is found in whole-grain products, milk, meat, eggs, cheese and peas. As a water soluble vitamin, any excess is excreted, although small amounts are stored in the liver and kidney.