40. DAILY NUTRIENT ALLOWANCES: RAT 



Values are approxljnatlonfl to adequate allovancea, Intended to provide a safe BarKln abore 



mlniaum requirements vhere known. Presentation of values In terms of "per kg body velrfit 

 per day Is for purposes of ccBiparlson between species, and does not necessarl^lmplTa 

 close correlation between nutrient need ani body weight within the species. 

 Required (R); Not required 



/I/ There Is no evidence that fat per se Is needed except as a means of supplying essential 

 fatty acids. /2/ 0.0006 mg e-carotene = one I. U. /3/ Values raised 20* to provide margin 

 above minimum requirements submitted by Broun, R. A. /U/ A generic term Including cyanoco- 

 balamln (vitamin Bj^g) «™1 "= hydrogenatlon product (known variously as Bip. or B,-»,) which 

 has approximately the same biological activity. /5/ FoUc acid Is not a cheSlcal entity but 

 a generic term for pteroylglutamlc acid (folacln), vitamin M, vitamin B^, factor U, L easel 

 factor, Norlte eluate factor. /6/ Essential when "sulfa" drugs are administered, or when 

 diet Is low In protein. /7/ Some authorities claim a requirement Is Indicated. /8/ The 

 aotl -hemorrhagic factor. A generic term for vitamin K, (2-methyl-}-phytyl-l,U-naphthoqul- 

 none), synthetic vltamlnK (menadione; 2-methyl-l,U-naphthoqulnone) and vitamin K, (2-methyl- 

 J-dlfamesyl-l.U-naphthoqulnone). /9/ A generic term for nicotinic acid (niacin) and nico- 

 tinic acid amide (nicotinamide); also for pellagra preventive (P. E. ) factor, anti-black- 

 tongue factor. /lO/ Includes pyrldoxlne, pyrldoxal and pyrtdoxamine. /u/ The cobalt pre- 

 sent m vitamin B^j takes care of the entire cobalt requirement of the rat as far as is 

 known; inorganic cobalt is not utilized nor required. /12/ Organic sulfur (menthlonlne) sat- 

 isfies all the sulfur requirements; inorganic sulfur Is not required. 



67 



