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B2-400 Side Effects

Generic name: riboflavin

Note: This document contains side effect information about riboflavin. Some of the dosage forms listed on this page may not apply to the brand name B2-400.

Applies to riboflavin: oral capsule, oral tablet

Side effects requiring immediate medical attention

Along with its needed effects, a dietary supplement may cause some unwanted effects. Riboflavin may cause urine to have a more yellow color than normal, especially if large doses are taken. This is to be expected and is no cause for alarm. Usually, however, riboflavin (the active ingredient contained in B2-400) does not cause any side effects. Check with your health care professional if you notice any other unusual effects while you are using it.

Medically reviewed by Last updated on Apr 14, 2021.

More about B2-400 (riboflavin)

Consumer resources

Other brands
Vitamin B2

Professional resources

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Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.