A container of fruit-flavored yogurt with crunchies on top may have all three kinds. The body uses protein for many different things, not only strong muscles, but also to boost our immune system, which keeps us from getting sick. Protein is in all foods except fruits and fats such as oil and margarines. It's most predominant in meats. A piece of red meat, such as a hamburger, a piece of chicken and a piece of fish all have the same amount of protein, ounce for ounce, said Bonci.
Protein also is in dairy products, grains and legumes, including beans, peas and lentils.
Around 40 to 50 grams a day. A serving of meat, poultry or fish the size of a deck of cards all have about 20 grams of protein. All rights reserved.