Why is distributing protein across meals beneficial for muscle protein synthesis?

• A. Spreading protein intake optimizes muscle protein synthesis across meals and supports muscle maintenance, especially with resistance training.
• B. Only total daily protein matters.
• C. Protein should be consumed only after workouts.
• D. Protein distribution does not influence MPS.

Answer: (A)

Distributing protein across meals keeps muscle protein synthesis repeatedly stimulated throughout the day. Each meal can trigger an anabolic response, but the effect maxes out after a certain amount of protein (roughly 20–40 g, depending on body size and age). When you spread protein intake into multiple meals, you hit that anabolic threshold more times, leading to more net muscle protein accretion or maintenance, especially when you’re doing resistance training. Leucine-rich proteins help push that response over the threshold, so having adequate protein at each meal ensures you consistently optimize MPS. While total daily protein is important, a well-timed, evenly distributed intake supports sustained MPS better than concentrating most protein in one meal. Post-workout protein is helpful, but relying only on after-exercise intake misses other opportunities to stimulate MPS throughout the day. A practical approach is to aim for a protein-rich portion at regular meals (and snacks) across the day, roughly 0.4 g/kg per meal (about 20–40 g per meal for many people), focusing on high-quality sources.