What are the symptoms of riboflavin (vitamin B2) deficiency?

Symptoms of riboflavin deficiency may include a sore throat, lip and mouth sores, a swollen tongue, conjunctivitis (or "pink eye") and facial and/or genital seborrheic dermatitis (oily, flaky, scaly skin). Riboflavin, also known as vitamin B2, is essential to the body's normal metabolism. It is found in red meat, fish, chicken and dairy products as well as in enriched bread. People who are deficient in riboflavin may be at increased risk of cataracts. Some research indicates that pregnant women who are deficient in riboflavin may be at increased risk of preeclampsia, a condition in which high blood pressure, protein in the urine and swelling may lead to premature birth and possibly death of the mother. Talk to your doctor about your own needs for riboflavin.