Why Is Protein Important?

Quick Answer

Protein is one of the essential nutrients your body needs to grow, repair, and stay healthy. It helps build muscles, bones, skin, hair, and organs, supports the immune system, and plays a role in making hormones and enzymes. Children need enough protein to support healthy growth and development, while adults need protein to maintain and repair body tissues throughout life.

What Is Protein?

Protein is one of the three macronutrients, alongside carbohydrates and fats. It is made up of tiny building blocks called amino acids, which the body uses to create and repair tissues.

Your body is constantly breaking down and rebuilding proteins. Unlike some nutrients, protein cannot be stored in large amounts for later use, so it's important to eat protein-rich foods regularly as part of a balanced diet.

Protein is found in both animal and plant foods, making it possible for people with different dietary preferences to meet their protein needs.

Why Does Your Body Need Protein?

Protein has many important jobs throughout the body.

It Helps Children Grow

Children grow rapidly during infancy, childhood, and adolescence. Protein provides the building blocks needed to develop muscles, bones, skin, organs, and other tissues as they grow.

It Repairs the Body

Every day, your body repairs cells that naturally wear out. Protein helps heal cuts, repair muscles after physical activity, and replace old or damaged cells.

It Supports the Immune System

Many parts of the immune system, including antibodies that help fight infections, are made from proteins. Getting enough protein helps your body stay prepared to defend itself against illness.

It Makes Enzymes and Hormones

Proteins are used to produce enzymes that help digest food and carry out thousands of chemical reactions inside the body. Some hormones, such as insulin, are also proteins or are made with the help of proteins.

It Helps You Feel Full

Protein is generally more filling than many other foods. Including protein as part of meals and snacks can help people feel satisfied for longer.

What Foods Contain Protein?

Protein is found in a wide variety of foods.

Animal Sources

• Milk

• Cheese

• Yogurt

• Eggs

• Chicken

• Turkey

• Beef

• Fish

• Seafood

Plant Sources

• Beans

• Lentils

• Chickpeas

• Peas

• Soy foods, such as tofu and edamame

• Nuts

• Seeds

• Whole grains

Eating a variety of protein-rich foods can also provide other important nutrients, including iron, calcium, zinc, healthy fats, and vitamins.

How Much Protein Do Children Need?

The amount of protein children need depends on their age, growth, and activity level. Most children who eat a balanced diet get enough protein without needing supplements.

Parents should focus on offering a variety of nutritious foods rather than trying to reach a specific amount at every meal. If you have concerns about your child's diet or growth, speak with your healthcare provider or a registered dietitian.

Can You Eat Too Much Protein?

For most healthy people, eating protein as part of a balanced diet is safe. However, eating very large amounts of protein while neglecting other food groups may lead to an unbalanced diet.

Children especially benefit from meals that include a balance of carbohydrates, healthy fats, protein, fruits, and vegetables rather than focusing heavily on one nutrient.

Common Questions

Is protein only important for athletes?

No. Everyone needs protein every day. While athletes may require more protein because of increased physical activity, protein is essential for children, adults, and older people alike.

Can vegetarians get enough protein?

Yes. Beans, lentils, peas, tofu, nuts, seeds, dairy products, eggs, and whole grains can all contribute to meeting protein needs. Eating a variety of these foods throughout the day provides the amino acids the body needs.

Is milk a good source of protein?

Yes. Milk naturally contains high-quality protein along with calcium, vitamin B12, and several other nutrients that support growth and bone health.

Do children need protein supplements?

Most healthy children do not need protein powders or protein supplements. A balanced diet usually provides all the protein they need for normal growth and development.

Key Takeaways

• Protein is an essential nutrient that helps the body grow, repair, and function properly.

• Children need protein to support healthy growth and development.

• Protein helps build muscles, skin, bones, organs, hormones, enzymes, and immune cells.

• Both animal and plant foods can provide protein.

• Most children get enough protein by eating a balanced and varied diet.

Sources

• Harvard T.H. Chan School of Public Health – The Nutrition Source (https://www.hsph.harvard.edu/nutritionsource)

• Academy of Nutrition and Dietetics (https://www.eatright.org)

• World Health Organization (https://www.who.int)