Riboflavin deficiency

[Lanell]

Riboflavin deficiency usually occurs with deficiencies of other B vitamins due to a diet low in vitamins or an absorption disorder.

People have painful cracks in the corners of the mouth and on the lips, scaly patches on the head, and a magenta mouth and tongue.
The diagnosis is based on symptoms, urine tests, and response to riboflavin supplements.
High doses of riboflavin supplements, usually taken by mouth, can correct the deficiency.

The vitamin riboflavin (vitamin B2) is essential for the processing (metabolism) of carbohydrates (to produce energy) and amino acids (the building blocks for proteins). It also helps keep mucous membranes (such as those lining the mouth) healthy. Riboflavin is not toxic, so consuming excess amounts of riboflavin is not a concern. Good sources of riboflavin include milk, cheese, liver, meat, fish, eggs, and enriched cereals.