Protein is a key macronutrient your body needs every day. It helps build and maintain muscles, organs, skin, hormones, enzymes, and immune cells. Whether you are growing, exercising, recovering from illness, or simply maintaining your health, protein plays a vital role in keeping your body functioning properly.
Protein provides amino acids that help build, repair, and maintain muscle tissue. After exercise, injury, or normal daily wear and tear, protein supports recovery and growth. When combined with resistance training, adequate protein intake can improve strength and support a healthy body composition.
Protein becomes increasingly important with age. Adults naturally lose muscle mass over time, a process known as sarcopenia. Consuming enough protein can help preserve strength, mobility, and independence throughout life.
Research shows that adequate protein intake supports bone health. Higher protein consumption is associated with improved bone density and a lower risk of fractures. When combined with calcium and vitamin D, protein helps maintain strong, healthy bones.
Protein increases satiety, helping you feel full longer after meals. This can reduce hunger and support lower overall calorie intake. Protein also requires more energy to digest than carbohydrates or fats, slightly increasing calorie expenditure.
For individuals trying to lose weight, protein helps preserve lean muscle while reducing body fat. Maintaining muscle is important for supporting metabolism and long-term weight management.
Your immune system depends on protein to produce antibodies and immune cells that help fight infections and disease. Protein also supports tissue repair and wound healing, making it especially important during recovery from illness, injury, or surgery.
Many hormones and enzymes are made from protein. These compounds regulate essential functions such as metabolism, digestion, growth, blood sugar control, and fluid balance. Without adequate protein intake, many critical body processes cannot function efficiently.
Healthy protein sources can contribute to cardiovascular health. Plant proteins, fish, legumes, nuts, seeds, and lean meats are associated with a lower risk of heart disease compared with diets high in processed foods and saturated fats. Protein-rich foods may also help support healthy blood pressure and blood sugar levels.
A balanced diet should include a variety of protein-rich foods, such as:
Animal proteins are considered complete proteins because they contain all nine essential amino acids. Plant proteins offer additional benefits, including fiber, antioxidants, vitamins, and minerals, making them valuable components of a healthy diet.
Protein requirements vary based on age, activity level, and individual health goals.
For example, a 150-pound (68 kg) person may need approximately 55–110 grams of protein per day, depending on age, activity level, and health goals.
Most healthy adults need approximately 0.8–1.2 g/kg of body weight daily. Individuals who exercise regularly or are actively building muscle may benefit from intakes closer to 1.6 g/kg.
As muscle loss naturally occurs with aging, higher protein intake is often recommended. Many experts suggest 1.2–1.6 g/kg per day, distributed across meals containing approximately 25–35 grams of protein each.
Protein is essential for building and repairing tissues, maintaining muscle and bone health, supporting immune function, producing hormones and enzymes, and helping manage body weight. Consuming a variety of high-quality protein sources in amounts appropriate for your age and activity level can support long-term health, strength, and overall well-being.
The content of this post is provided for informational purposes only and is not intended as medical advice or as a substitute for the medical advice of your physician.