For decades, gym culture has insisted that consuming protein within 30 to 60 minutes of your workout is essential for maximizing muscle growth — the so-called 'anabolic window.' However, recent research suggests this window is far wider than previously believed and that total daily protein intake matters significantly more than precise timing.
A landmark 2025 review published in Sports Medicine analyzed 23 studies on protein timing and found that as long as individuals consumed adequate total protein throughout the day — roughly 0.7 to 1 gram per pound of body weight — the specific timing around workouts had minimal impact on muscle protein synthesis or hypertrophy outcomes.
That said, there are practical reasons to include protein in your post-workout meal. Training in a fasted state and then delaying protein intake for several hours may modestly reduce muscle protein synthesis. The current consensus among sports nutritionists is to distribute protein intake evenly across three to four meals spaced throughout the day, with one of those meals falling within a few hours of your training session.
