Protein plays a crucial role in the prevention of muscle loss by providing essential amino acids necessary for muscle repair and growth. Consuming adequate protein, especially post-exercise, helps stimulate muscle protein synthesis and reduce the impact of aging on sarcopenia, the loss of muscle mass. It also aids recovery after intense physical activity, ensuring muscles are less susceptible to atrophy. For those undergoing weight loss or resistance training, increased protein intake can help preserve lean body mass, making protein an essential nutrient for maintaining muscle health over time.