Protein plays a vital role in weight loss by promoting satiety and preserving lean muscle mass during a caloric deficit. High-protein diets can help reduce hunger levels, leading to lower overall caloric intake. Additionally, protein has a higher thermic effect, meaning the body expends more energy digesting it compared to fats or carbohydrates. This can further support weight management. Sufficient protein intake is crucial for those engaging in exercise, as it aids in muscle repair and recovery, enhancing overall fitness outcomes.