Effect of Fat in the Diet of Rats on their Growth and their Excretion of Amino Acids.

摘要

The importance of the interrelationships among the various nutrients of the diet has been increasingly realized during the last decade. Among these relationships, dietary fat has been found to influence energy and protein metabolism and various physiological functions. Increasing the fat content of isocaloric diets from 2 to 30% resulted in an increase in the rate of weight gain and a decrease in the heat production of rats (Forbes, Swift, Elliott and James, 46; Forbes, Swift, James, Bratzler and Black, 46). Rats fed diets low in protein made more rapid and efficient gains when 30% of fat was included in the diet tban when only 2% was included (French, Black and Swift, 48). Deuel et al. (47) have shown that feeding rats diets containing from 5 to 40% of fat results in better growth, greater physical capacity, and better reproductive and lactation performance than does the feeding of a low fat diet supplemented with methyl linoleate. The low fat diets used in previous investigations reviewed by the present authors were provided with the essential unsaturated fatty acids, so the beneficial effects of the fats must be attributed.