Abstract
Effects of different dietary proteins on plasma and liver lipids were examined in rats fed diets containing the isonitrogenous level (3.2%) of either casein, whole egg protein, soy bean protein, wheat gluten or rice protein. The concentration of plasma cholesterol was lower in rats fed soy protein or egg protein than in the animals fed casein, the difference was statistically significant in one experiment. The increase in liver cholesterol due to feeding a high cholesterol (1.0%) diet was most marked with casein and the least with egg protein. The dietary protein-dependent responses of plasma and liver lipids may at least be a consequence of the differences in the composition and/or the relative concentration of specific amino acids.
