The ideal macronutrient ratio for someone looking to build muscle typically consists of protein (around 25-30%), carbohydrates (up to 60%), and healthy fats (around 15-20%). Protein is vital for muscle repair and growth, while carbohydrates provide the necessary energy for intense workouts. Healthy fats also play a role in hormone production and overall health. Individual needs may vary based on factors such as activity level and metabolism, but this general macronutrient distribution supports effective muscle building when paired with a consistent resistance training program.