Peters and Harper (1985)

Male King rats were fed diets with varying levels of protein (5-75%) for 11 days. Food intake and weight gain was greatest on diets with protein contents of 20-35%.

Peters and Harper (1987)

Fatd were fed diets of 0-55% casein

Liddle et al (1986)

Rats were fed diets of different macronutrient composition by intragastric injection to determine the response of CCK, a hormone secreted by the gut that promotes satiety.. Intact protein, but not amino acids, were the only nutrient to promote CCK release.

Krauss and Mayer (1965)

Female rats were fed diets of 20-90% protein for 5 days, and found that food intake was depressed by high levels of protein.

Hannah, Duby, and Hansen (1990)

With 4 adult Rhesus monkeys, calorie intake was lower on a 50% protein compared to a 14% protein diet over four weeks.

Animal studies examining the effect of dietary protein on satiety and weight loss yield conflicting results.