This energy is used to support the most basic body functions, such as the pumping of the heart, breathing, operation of the immune system, and growth. Without proper nutrition, people often get sick, and are not able to participate in the activities of daily life without becoming worn out or injured. People need more than 40 different nutrients to stay healthy. Proteins are called the body's building blocks because they are the foundation of muscle. Proteins are contained in meat, fish, dairy products, and legumes, which are peas and beans.
Carbohydrates are the body's main source of energy.
They are found in fruits, grains, vegetables and sugars. Carbohydrates are stored in the body as glycogen, a quick source of energy. If eaten in excess or unused due to lack of exercise the body changes them into fat for storage. Fats help to move vitamins to various parts of the body and help in cell and hormone production. Fats are found in oils, many dairy products, meats, nuts and seeds.