45O MISSOURI AGRICULTURAL EXP. STA. RESEARCH BULLETIN NO. 12 



several months. Considerable variation in the color of the fat was 

 noticed. Although it was not possible to accurately trace the cause 

 of this variation, as we did in the case of cows in an earlier paper 

 of this series, it was undoubtedly due to changes in diet. 



In conclusion it may be stated that all students of human anatomy 

 are familiar with the fact that the fat on the human body is often 

 characterized by a marked yellow color. In view of the fact that the 

 pigments of the milk fat and body fat of the cow are identical, it 

 must therefore be concluded that the pigments of the milk fat and 

 body fat of humans are identical. 



SUMMARY* 



1. The fat of human milk may be tinted by carotin and xantho- 

 phylls, the pigments which characterize the fat of cows' milk. The 

 relative proportion of carotin to xanthophyll in human milk fat is 

 much more nearly equal than in the fat of cows' milk. 



2. The colostrum fat of human milk is characterized by a very 

 high color as is the case with the fat of the colostrum milk of cows. 



3. The pigment of human body fat is no doubt identical with the 

 pigment of human milk fat. 



*See page 438 for summary of "The Yellow Pigment of Blood Serum." 

 See page 446 for summary of "Carotin and Xanthophylls During Digestion." 



