The recommended daily allowance of protein for adult men is 56 grams, while the amount for adult women is 46 grams. It varies for children based on age and gender, ranging between 13 and 52 grams. In general, 10 to 35 percent of daily calories should come from protein sources.
Protein is found in meats, legumes, tofu, eggs and nuts. Consumption of adequate levels of protein is important because protein is part of every cell, tissue and organ in a human being. Consumed protein is broken down into amino acids, which then rebuild and replace worn-out proteins in the body.