The riboflavin content of food served in Royal Air Force messes

Abstract
The riboflavin content of food served in R.A.F. messes was estimated by biological and microbiological methods; the results by the former method tended to be somewhat higher than those by the latter but both were in good agreement. The daily intake of ribo-flavin was 1.5-2.6 mg. and avged. 1.9 mg. No sign of ribo-flavin deficiency was observed and evidence is presented that the avg. riboflavin requirement of adults does not exceed 2.0 mg. daily.