The Microbiological Assay of “Folic Acid” as Applied to Milk

Abstract

Data are presented which demonstrate that with the methods at present available it is difficult to arrive at an accurate estimate of the average “folic acid” content of milk. Data secured by two microbiological methods and a chick technic are not in agreement, but those obtained by any of the methods support the conclusion reached by other investigators, that milk is a poor source of “folic acid.”