[Study on digestibility and energy availability of fats and oils in Japanese].

Four young male adults were fed a semisynthetic diet including rice and chicken as protein for seven days (Basal diet period), and in the following seven days 30g of corn oil and then for seven days 30g of lard were added at the expense of part of the corn starch and sugar in the basal diet (Test diets period). Urine and feces were collected completely throughout the periods and the contents of fat and energy in these excreta were determined. The results obtained were follows: 1) Digestibility of fat was 98.8% (corn oil) and 100.0% (lard). 2) The ratio of the total available energy to intake energy (Net Energy Avaiability) was 98.8% (corn oil) and 98.0% (lard).