The recommendations for protein consumption depend on the essential amino acid and total nitrogen content of a diet, and food digestibility. International recommendations are based on egg or milk proteins. However, populations eat different food mixtures. Brazilians use rice and beans as their main protein food source. This study presents different Brazilian diets, with variable amount of rice and beans. The results show that for each diet there is a different amount of protein recommended. Pre-school children, for example, must receive from 1.15 to 1.77 g/protein/day, depending on the mixture of their dietary protein intake. Besides the diet protein's quality and quantity, the total food intake and presence of other essential nutrients, such as iron, calcium and vitamin C has also to be considered. The correct protein recommendation with respect to a diet or a mixture of food, should take into consideration: digestibility, total nitrogen, essential amino acids, presence of others nutrients and weight os food consumed.
Dietary proteins; Nutritional requirements; Rice; Bean
