682 



PANTOTHENIC ACID 



XI. Requirements and Factors Influencing Them 



A. OF ANIMALS 



GEORGE M. BRIGGS and FLOYD S. DAFT 



The pantothenic acid requirement of animals varies with species, age, 

 type of diet, period of depletion, various stresses, and other factors to be 

 considered. Many careful attempts have been made to determine the mini- 

 mal level required for optimum growth for many animals but considerably 

 more work is needed. Accepted values of today may need to be changed 

 as new nutritional developments unfold. 



1. Minimal Levels 



The requirements for pantothenic acid which are available are given in 

 Table XX with key references. The values given are minimal levels, with 



TABLE XX 



Minimal Calcium Pantothenate Requirements for Optimum Growth, 

 Performance, or Production 



Other key 

 references to 



studies on 

 requirement 



Animal 



Mg./lOO g. 

 of diet 



Mg./kg. body 

 weight per day 



Mg./day 



Rat 



Weanling 



0.081' 2 

 0.04-0. 10-^ ■ 

 0.10^ 



0.08-0.106. 

 0.05-0.10' 



" 40 7 daily for maximum growth ; 100 y daily for prevention of graying. 



1 K. Unna, J. Nutrition 20, 565 (1940). 



2 K. Unna and W. L. Sampson, Proc. Soc. Exptl. Biol. Med. 45, 309 (1940). 



» G. A. Emerson and H. M. Evans, Proc. Soc. Exptl. Biol. Med. 46, 655 (1941). 



