# This Is How Much Protein You Need to Build Muscle
Building muscle requires consuming enough protein to support muscle protein synthesis. Research from the International Society of Sports Nutrition (ISSN) establishes a clear target: athletes aiming for muscle growth should consume 1.6 to 2.2 grams of protein per kilogram of body weight daily. For a 180-pound person, this translates to roughly 130 to 180 grams per day.
The timing of protein intake matters as well. Studies show that consuming 20 to 40 grams of protein within two hours after resistance training optimizes muscle repair and growth. This window capitalizes on elevated muscle protein synthesis rates following exercise, which remain elevated for 24 to 48 hours post-workout.
Protein quality affects outcomes. Complete proteins containing all nine essential amino acids, particularly leucine, drive muscle-building processes more effectively than incomplete sources. Animal proteins like chicken, beef, eggs, and Greek yogurt deliver optimal amino acid profiles. Plant-based athletes can combine complementary sources like beans with rice to achieve complete amino acid ratios.
Total daily calories matter as much as protein quantity. You cannot build muscle in a caloric deficit. Research confirms that protein's thermic effect burns approximately 20 to 30 percent of calories consumed through protein, meaning your body expends more energy digesting protein than carbohydrates or fats. This metabolic advantage supports both muscle growth and fat loss simultaneously during a controlled surplus.
Progressive overload combined with adequate protein drives hypertrophy. Resistance training creates micro-tears in muscle fibers; protein provides the amino acids necessary for repair and growth beyond baseline size.
Individual needs vary based on age, training experience, and recovery capacity. Beginners may see results at the lower end of the ISSN range, while advanced lifters approaching genetic limits