Longevity expert Dr. Joseph Antoun suggests that excessive protein intake, especially from animal sources, might shorten lifespan by stimulating IGF-1 secretion. He recommends a balanced approach, incorporating some meat in plant-based diets before 30 and after 65 to maintain muscle mass. Between 30 and 65, prioritizing plant-based proteins like beans and legumes is advised for optimal health and longevity. Read more below.