10 



V. BLOOD LIPIDS 



per cent for men and 0.22 milligram per cent for women, are quite out of 

 line with the later results. Couperus 955 reported a somewhat higher value 

 for serum tocopherol, namely 0.7 milligram per cent. 



In cows, the tocopherol content is somewhat lower than in man. Thus, 

 van der Kaay and associates 956 reported an average of 800 microgram 



Fig. 



2 4 6 8 10 12 14 16 18 20 22 24 26 28 



HOURS AFTER TOCOPHEROL INGESTION 



11. The comparative absorption of d-a- and d-7-tocopherols by- 



normal human adults as determined by the resulting tolerance curves for 

 serum tocopherols. 136 



per cent (0.80 milligram per cent) in cows on pasture, while the serum 

 tocopherol was reduced to 0.1 to 0.2 milligram per cent in winter, pre- 

 sumably when green pasturage was not available. Meunier et a?. 957 cited 

 a range of 200 to 300 microgram per cent as the normal plasma tocopherol 

 level in sheep. Quaife et al., U6 recorded a value of 0.70 milligram per cent 

 for male rats receiving a vitamin E-deficient diet supplemented with 1 



955 J. Couperus, Z. Vitaminforsch., IS, 193-207 (1943). 



966 F. C. van der Kaay, G. H. B. Teunissen, A. Emmerie, and M. van Eekelen, Ann. 

 New York Acad. Sci., 52, 276-283 (1949). 



957 P. Meunier, R. Ferrando, and P. Chenavier, Compt. rend. soc. biol., 142, 525-527 

 (1948). 



