What are The Nutrients that Our Bodies Use to Build and Repair Cells and Give Us Energy?

Curated by Claudia Shannon / Research Scientist / ishonest

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All food groups — carbohydrates, proteins, fats, vitamins and minerals — work together to give your body energy and nutrients. They help build and maintain body cells and tissues.

How Body Cell Repair Works

So, where does food come in? The food you eat provides energy as well as the nutrients that the cells in your body use for growth, repair and regulation of bodily functions. There are over 50 known nutrients that help build and maintain the body's cells and tissues.

Carbohydrates Supply Energy

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According to the National Institutes of Health (NIH), carbohydrates are your body's primary source of energy. The European Food Information Council (EUFIC) explains that when you eat carbohydrates, your body breaks them into glucose, which is released into the bloodstream for energy. Glucose is also converted into glycogen and stored in your liver and your muscles as a ready source of fuel to power your activity.

Proteins Build and Repair Tissues

According to the NIH, proteins are often referred to as the building blocks of your body because they are critical to the growth and repair of your cells. In fact, protein is a major part of each of your hair, skin, nail, muscle, bone and organ cells, and it's also found in most of your bodily fluids.

Your body can also use proteins as an energy source. Like carbohydrates, each gram of protein supplies 4 calories. Proteins consist of amino acids. There are 20 different types of amino acids, of which nine are considered essential because your body cannot make them on its own and needs to obtain them from food.

The NIH lists lean meat, eggs, poultry, seafood, beans, peas, soy products, dairy products, nuts and seeds as some of the sources of protein. Animal proteins are considered to be complete proteins as they contain all nine essential amino acids.

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With a few exceptions, plant proteins are incomplete proteins because they don't contain all the essential amino acids. However the NIH notes that they are still extremely healthy as they don't have any cholesterol, are lower in saturated fat and provide fiber and other nutrients that help build and maintain cells and tissues.

Fats Build Cells and Membranes

According to the Academy of Nutrition and Dietetics, fats help provide structure to your cells and also cushion your cell membranes to help prevent them from getting damaged. Fats are also a concentrated source of energy.

Each gram of fat supplies your body with 9 calories. That's more than twice the energy you'd get from carbs or protein. Your body also needs fats to absorb fat- soluble vitamins, such as vitamins A, D, E and K.

The NIH notes that fats occur naturally in many foods, including meat, poultry, eggs, seafood, nuts, seeds, dairy products, avocados and coconuts. Oils are also a source of fat.

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There are different types of fats. Monounsaturated and polyunsaturated fats are the healthiest, saturated fats are not as healthy and trans fats are the worst.

Vitamins and Minerals Promote Health

According to the Academy of Nutrition and Dietetics, vitamins and minerals are micronutrients that play an important role in cell metabolism and support overall health. Your body needs vitamins to heal wounds, form bones, maintain your immunity, keep your eyes and skin healthy and produce energy. Minerals are important for cardiovascular function and provide structure to your skeleton.

These nutrients are used to build and repair cells. Calcium, for example, is the building block for bone cells. Iron is the building block for your blood. The Academy of Nutrition and Dietetics notes that your blood cells only last for a few months, so your body constantly requires iron and protein to make new blood.

Vitamins also have antioxidant properties and protect the cells in your body from damage. Vitamins A, C and E all serve as antioxidants and fight harmful substances known as free radicals. Free radicals can weaken healthy cells and make them more prone to cancer and cardiovascular problems.

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