As part of an optimum diet, 20 to 30 percent of your daily calories should come from protein, which amounts to between 80 and 120 grams on a 2,000-calorie-a-day diet.
If you are vegetarian and concerned about getting enough protein, one excellent source of vegetable protein is wheat meat (gluten), much used in Chinese vegetarian cuisine. Soy foods are another superior source. Baked tofu in dishes such as fajitas and stir fries has a consistency similar to cooked chicken or turkey and comes in a variety of flavors. In addition to being an excellent source of protein, whole soy foods also contain healthy types of fat and isoflavones - unusual compounds that may offer significant protection against cancer, particularly hormonally driven malignancies such as breast and prostate cancers.