Quick guide to Vitamin B2 (Riboflavin)
Read the full guide
- the production of energy from food
- normal growth and development
- a healthy immune system
- healthy skin, hair and blood cells
- iron, pyridoxine and niacin functions
- hormone function
- a healthy nervous system and brain
Absorption and metabolism
Daily intake is necessary.
Deficiency
Symptoms include red, swollen, cracked mouth and tongue; fatigue; depression; anemia; and greasy, scaly skin on the face, body and limbs. Deficiency may also contribute to cataract formation.
Sources
Good sources include meat, dairy products and fortified grains.
Daily recommended dietary intakes
- Men - 1.3 mg
- Women - 1.1 mg
- Pregnancy - 1.4 mg
- Lactation - 1.6 mg
Toxic effects of excess intake
Riboflavin toxicity is very rare. Possible symptoms include itching, numbness, sensations of burning or pricking, and a sensitivity to light.
Therapeutic uses of supplements
Supplements have been used to treat anemia, skin problems, carpal tunnel syndrome, migraine, stress and fatigue.
Interactions
Sulfa drugs, estrogen, alcohol, major tranquilizers and some antidepressants may increase riboflavin requirements.