Protein is one of the major nutrients. It provides the body with energy (calories). Your body needs protein to build and repair cells. It is also part of important enzymes and hormones as well as antibodies that support the immune system.

Protein is made of building blocks called amino acids. The human body needs 20 different amino acids to function properly. Some amino acids are made by the body. But 9 of them (the essential amino acids) must come from food. Soy foods and animal sources of protein (milk, eggs, meat, poultry, fish, and seafood) contain all the essential amino acids in the amounts our bodies need.

Most plant foods contain some of the essential amino acids in varying amounts. Beans have some amino acids, and grains have other amino acids. Eating these different types of food throughout the day will provide your body with the protein it needs.

Foods that contain protein

Protein is found in a variety of foods. Protein foods include lean meat, poultry, and fish and other seafood.

Protein isn't just found in meat. Other foods that are good sources of protein include:

• Beans, peas, and lentils.
• Tofu and soy products.
• Hummus.
• Nuts and seeds.
• Peanut butter and other nut or seed butters.
• Eggs.
• Milk, cheese, and yogurt.

You can also buy protein bars, drinks, and powders. Check the nutrition label for the amount of protein in each serving.