5 Things to Know About Riboflavin aka Vitamin B2

Just like thiamin, which I wrote about recently, riboflavin is another B vitamin commonly found in fortified foods such as cereals, enriched flour, pasta, sauces, baby foods, energy drinks. In case you have wondered what it is and why it is needed, here is some research for you in a simple Q&A format. I am following up on my article on vitamin A from a few weeks ago. Let me know what you think of this format and if you have any other questions that I did not cover here. I will get them answered by one of our experts and post them under Ask the Expert column.

What is Riboflavin?

Riboflavin is also known as vitamin B2, one of the 8 B vitamins needed for many important cell functions inside our body. In short, they are needed for healthy functioning and growth of child’s body. Together they are also known as vitamin B complex especially in nutritional supplements.

Riboflavin, like the other B vitamins, is soluble in water. Cells in our body need energy produced by special biochemical reactions. Certain types of enzymes help these reactions happen, but they too need help from coenzymes produced by riboflavin. Obviously, this is very complex chemistry, but the point is that riboflavin is an important player in the chemical reactions that produce energy at the cellular level. Recently, high doses of riboflavin have been found effective in preventing migraine headaches. Seek medical advice before using riboflavin for migraines.

It is also used as a food coloring because of its yellow or yellow-orange color. The more soluble riboflavin 5′-phosphate is called the E101 food color.

Why does my child need it?

According to the 2nd edition of the PDR for Nutritional Supplements, riboflavin is involved in the conversion of carbohydrates, fat and protein into energy required for cell functions. Riboflavin also has antioxidant activity which protects your body from reactive oxygen radicals. Just like the other B vitamins, riboflavin plays an important role in your child’s metabolism.

How much Riboflavin should my child be getting?
What are good sources of Riboflavin?

For infants, the FDA has recommended a daily amount of 0.6 mg. And for toddlers less than 4 years old, the recommendation is 0.8 mg. Pregnant and nursing women are recommended to take about 2 mg per day. Healthy adults are advised to take about 1.7 mg per day.

Riboflavin is usually present in most plant and animal food sources although in small amounts. Yeast extract is exceptionally rich in riboflavin, and organ meats like liver and kidney are also good sources. Here are a few examples of different food sources and amount of riboflavin per serving (source: wikipedia and Linus Pauling Institute):

Cooked spinach, half cup = 0.2 mg
Asparagus, about 6 spears = 0.14 mg
Almonds, cooked, 1 cup = 0.8 mg
Fortified breakfast cereals, 1 cup = 0.5 – 2.0 mg
Milk, 1 cup = 0.34 mg
Egg, cooked, 1 large = 0.27 mg
Cheddar cheese, 1oz = 0.11 mg
Fish, salmon or halibut, 3 oz (deck of cards) = 0.1 mg
Chicken/beef, cooked, 3 oz = 0.16 mg
Bread, whole grain or enriched flour, 1 slice = 0.08 mg

Riboflavin is destroyed by ultraviolet light. As you can see, riboflavin is naturally available in many common food sources. There is really no need to look for a nutritional supplement for riboflvain although you will find many multivitamin products on the market. Check out my review of some of the popular kids brands of multivitamins.

Riboflavin is well tolerated without any adverse effects. There is no reason, however, to take a high dose of riboflvain supplement.

What happens if my child does not get enough riboflavin?

According to the PDR for Nutritional Supplements, riboflavin deficiency (also known as ariboflavinosis) can cause any of the following conditions:

Cracked or sore lips, especially on the outer corners
Sore throat, redness or swelling of the lining of the mouth
Magenta tongue
Skin lesions, dermatitis
Poor iron metabolism and absorption, lower hemoglobin levels
Vascularization of the cornea

These symptoms are medical conditions and should be interpreted by a doctor. It is not common for riboflavin deficiency to occur in isolation. Usually it happens when a lot of other vitamins are also absent because of poor nutrition, digestive disorders or other medical conditions.

Should I be concerned about riboflavin deficiency?

Since riboflvain is commonly available in many foods and cereals, it should not be a big concern. However, if your child’s diet is mainly junk food and not enough whole grains, nuts, fruits and vegetables, you may want to pay attention to his overall vitamin B needs.

What do you think? What changes, if any, would you consider making to your child’s diet so she gets enough riboflvain? Do you have recipes that use food sources rich in riboflavin? I would love to hear from you!