Select Committee on GRAS Substances (SCOGS) Opinion: Riboflavin, Riboflavin-5'-phosphate

The GRAS Substances (SCOGS) Database allows access to opinions and conclusions from 115 SCOGS reports published between 1972-1980 on the safety of over 370 Generally Recognized As Safe (GRAS) food substances. The GRAS ingredient reviews were conducted by the Select Committee in response to a 1969 White House directive by President Richard M. Nixon.

Riboflavin and Riboflavin-5'-phosphate

SCOGS Report Number: 114
NTIS Accession Number: PB301406*
Year of Report: 1979
GRAS SubstanceID Code

21 CFR Section


SCOGS Opinion:

Riboflavin, an essential nutrient, is a constituent of two coenzymes: riboflavin-5'-phosphate [flavin mononucleotide (FMN)] and flavin adenine dinucleotide (FAD), which are essential components of a number of oxidative enzyme systems. Various foods such as bakery, cereal and pasta products are commonly enriched by the addition of 2 to 5 mg per kg products. Also, many commonly used vitamin supplements contain riboflavin. The amount of riboflavin-5'- phosphate added to food is minuscule.

The Recommended Dietary Allowance of riboflavin is 0.6 mg per 1000 kcal for persons of all ages with an additional 0.3 mg daily for pregnant and 0.5 mg for lactating women. A recent U.S. survey of over 20,000 persons, 1 to 74 years of age, revealed a mean average intake of 1.92 and a median of 1.69 mg per day.

The acute toxicity in animals of riboflavin or FMN given orally is extremely low, with LD50 values several orders of magnitude greater than the dietary requirements or the estimated addition to food. The relative insolubility of riboflavin limits the absortion when large amounts are ingested. No reports have come to the attention of the Select Committee suggesting carcinogenic, mutagenic, or teratogenic effects of riboflavin. Normal reproductive performance was observed in three generations of rats fed several hundred times their daily requirements. Toxic effects in man have not been reported apart from rare instances of sensitivity.

In light of these considerations, the Select Committee concludes that:

There is no evidence in the available information on riboflavin or riboflavin-5'-phosphate that demonstrates or suggest reasonable grounds to suspect, a hazard to the public when they are used at levels that are now current or that might reasonably be expected in the future.

*Complete reports containing details of the safety studies that formed the basis of the opinions and conclusions and are available from the National Technical Information Service (NTIS), 5285 Port Royal Road, Springfield, VA 22161 (703) 605-6000.

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