Protein is a macronutrient the body needs daily because tissues are constantly renewing and amino acids are required for repair, enzymes, hormones, and immune functions. Consistent adequate protein intake can support maintenance of lean mass, improve satiety, and aid recovery. The key words are “adequate” and “balanced.” Too little protein over time may contribute to muscle loss, slower recovery, and reduced performance. Very high intake—especially with excess calories—can contribute to weight gain and may increase digestive discomfort in sensitive individuals. For most healthy adults, spreading protein across the day and staying within reasonable intake ranges is a practical approach. The correct “how much” depends on body weight, activity level, and health status. People with kidney disease or other medical conditions may need individualized targets, so daily protein strategy should be aligned with personal health context rather than generic extremes.