DISTRIBUTION OF ESSENTIAL FATTY ACIDS 



829 



Table 2 



The Relative Maximum Amounts of Essential Fatty Acids in Animal and Fish 

 Fats as Determined by Analysis and by Bioassay" 



" Unless otherwise noted, data are from the summary of H. J. Deuel, Jr., Nutritional 

 Significance of the Fats, Progress in the Chemistry of Fats and Other Lipids, 2, 99-192 

 (1954), and from H. J. Deuel, Jr., The Role of Fat in Human Nutrition, in A. E. Bailey, 

 Cottonseed and Cottonseed Products, Intersrience, New York and London, 1948, 763-811. 

 Dashes indicate that no data are available. 



'' Unless otherwise noted, data are from H. J. Thomasson, Intern. Z. Vitaminforsch., 

 25, 63-82 (1953). Bioassay values of essential fatty acids are expressed in units (1 

 Unit = activity of 10 mg. linoleic acid), which are practically identical with % com- 

 position. 



'^ Value given for "beef suet." 



'' Value given for "lard." 



' Based upon spectrophotometric data for diene and trienc reported by H. J. 

 Thomasson. See footnote''. 



/ Based upon spectrophotometric data for acids with four or more double bonds, 

 reported by H. J. Thomasson. See footnote''. 



Thus, on a hempseed oil diet, egg-yolk contained as much as 41.9% of 

 linoleate and 10% of linolenate. Like\vise, pig fat Avas reported as having 

 as much as 38.9% of linoleate and 0.5% of linolenate following a soyl)ean 

 oil diet" (see Table 2). However, these high values have not been con- 



