Ingredient · E101

B-2

Source
Unknown
Not yet classified by editors
Allergen
No
Role in food
Riboflavin is often added to foods to fortify them with vitamin B2, helping to …

What is B-2?

B-2 is another name for Riboflavin, a type of B vitamin. It is found naturally in foods like eggs, meat, and dairy. It can also be produced synthetically for use as a food additive.

Is B-2 gluten-free?

It does not contain gluten.

Is B-2 a major allergen?

Riboflavin is not derived from any of the 9 FDA major allergens.

What is B-2 used for?

Riboflavin is often added to foods to fortify them with vitamin B2, helping to prevent deficiencies.

Is B-2 safe?

Riboflavin is recognized as safe and effective by the FDA when used as a nutrient supplement or color additive.

Why it's used

Riboflavin is often added to foods to fortify them with vitamin B2, helping to prevent deficiencies. It is also used as a yellow colorant in various food products. You can find it in cereals, breads, dairy products, and infant formulas.

Health notes

Riboflavin is recognized as safe and effective by the FDA when used as a nutrient supplement or color additive. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) has evaluated riboflavin and established an acceptable daily intake. High doses of riboflavin can cause urine to turn a bright yellow color, but this is generally considered harmless.

Allergen info

Riboflavin is not derived from any of the 9 FDA major allergens. It does not contain gluten.

Foods that contain B-2

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%DV Explained: 5% Low, 20% High →

Auto-generated content. This description was generated automatically and is pending editorial review. Inaccuracies are possible. Found a mistake? Contact us.

Last updated: September 28, 2026

Note: This site presents label data from USDA FoodData Central for general information. It is not medical advice. Check the package label; formulations change.