Further Studies on the Folic Acid and Vitamin B12 Content of Cow's Milk

The relic acid and vitamin BI.~ content of cow's milk has been reported by Collins, Harper, Schreiber and Elvehjem (4). The colostrum from one Guernsey cow was observed to contain higher levels of these vitamins than the milk; therefore, further analyses have been made in an effort to determine the average relic acid and vitamin B~2 content of the colostrum of the various breeds of dairy cows. Since the data reported by Collins et al. (4) represent samples obtained only during the summer of 1950, the content of these vitamins in cow's milk during other seasons also was investigated.