Heath Notes

Vitamin B2

Also indexed as: Riboflavin

Vitamin B2 is a water-soluble vitamin needed to process amino acids and fats, activate vitamin B6 and folic acid, and help convert carbohydrates into the fuel the body runs on—adenosine triphosphate (ATP). Under some conditions, vitamin B2 can act as an antioxidant.

Where is it found?

Dairy products, eggs, and meat contain significant amounts of vitamin B2. Leafy green vegetables, whole grains, and enriched grains contain some vitamin B2.

Vitamin B2 has been used in connection with the following conditions (refer to the individual health concern for complete information):

Science Ratings	Health Concerns
	Anemia (if deficient) Migraine headaches
	Canker sores Cataracts High homocysteine (for people with a specific genetic makeup) Night blindness (if deficient) Parkinson’s disease
	Preeclampsia Sickle cell anemia
Reliable and relatively consistent scientific data showing a substantial health benefit. Contradictory, insufficient, or preliminary studies suggesting a health benefit or minimal health benefit. For an herb, supported by traditional use but minimal or no scientific evidence. For a supplement, little scientific support and/or minimal health benefit.

Who is likely to be deficient?

Vitamin B2 deficiency can occur in alcoholics. Also, a deficiency may be more likely in people with cataracts¹ ² or sickle cell anemia.³ In developing countries, vitamin B2 deficiency has been found to be a risk factor for the development of preeclampsia in pregnant women.⁴ People with chronic fatigue syndrome may be deficient in vitamin B2.⁵

How much is usually taken?

The ideal level of intake is not known. The amounts found in many multivitamin supplements (20–25 mg) are more than adequate for most people.

Are there any side effects or interactions?

At supplemental and dietary levels, vitamin B2 is nontoxic.

Vitamin B2 works with vitamin B1, vitamin B3, and vitamin B6. For that reason, vitamin B2 is often taken as part of a B-complex supplement.

Are there any drug interactions?
Certain medicines may interact with vitamin B2. Refer to drug interactions for a list of those medicines.

References
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The information presented in Healthnotes is for informational purposes only. It is based on scientific studies (human, animal, or in vitro), clinical experience, or traditional usage as cited in each article. The results reported may not necessarily occur in all individuals. For many of the conditions discussed, treatment with prescription or over the counter medication is also available. Consult your doctor, practitioner, and/or pharmacist for any health problem and before using any supplements or before making any changes in prescribed medications. Information expires June 2009.

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Where is it found?

Who is likely to be deficient?

How much is usually taken?

Are there any side effects or interactions?