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American Journal of Clinical Nutrition, Vol 24, 194-199, Copyright © 1971 by The American Society for Clinical Nutrition, Inc.

Dietary protein level and serum and erythrocyte lipids in young adult males

C. E. Elson 1, E. Humleker 2, and L. Pascal 3

1 Department of Nutritional Sciences, University of Wisconsin, Madison, Wisconsin 53706
2 Wisconsin State University, Oshkosh, Wisconsin 54901
3 Lutheran General Hospital, Park Ridge, Illinois 60068

The effect of dietary protein level on serum lipids was studied in a group of young men. Isocaloric diets were prepared to contain equal levels of all other nutrients for which Recommended Daily Allowances have been established. The protein levels were 48 and 141 g; the composition was such that the ratios of the essential amino acids, cystine and tyrosine, were constant. The ratios of fat to carbohydrate and simple to complex carbohydrates were also constant in both diets. One fat mixture was used for both diets. Serum cholesterol levels were lower (P < 0.005) and lipid phosphorus levels were higher (P < 0.01) when the subjects were fed the 48 g protein diet. When this diet was fed, the erythrocytes contained a greater percentage (P < 0.05) of linoleic acid.






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Copyright © 1971 by The American Society for Nutrition