Ariboflavinosis, riboflavin deficiency, is a rare condition that often occurs with other nutrient deficiencies. The symptoms of this condition are shown in the figure below.

Figure 10.421 The symptoms of riboflavin deficiency¹

The most notable symptoms include angular stomatitis (aka angular cheilitis, like cheilosis), which is a lesion that forms at the corners of the mouth as shown below.

Figure 10.422 Angular Cheilitis²

Glossitis is the inflammation of the tongue, which can be accompanied by redness or inflammation of the oral cavity. Dermatitis is also frequently a symptom^3,4.

There has been no toxicity of riboflavin reported.

References & Links

1. http://www.fao.org/docrep/W0073e/p206.gif

2. http://en.wikipedia.org/wiki/File:Angular_Cheilitis.JPG

3. Gropper SS, Smith JL, Groff JL. (2008) Advanced nutrition and human metabolism. Belmont, CA: Wadsworth Publishing.

4. Byrd-Bredbenner C, Moe G, Beshgetoor D, Berning J. (2009) Wardlaw’s perspectives in nutrition. New York, NY: McGraw-Hill.