This study challenges the long-held belief that the anabolic response to protein ingestion during post-exercise recovery is transient and has an upper limit. Using a quadruple isotope tracer approach, the researchers demonstrated that ingesting 100 g of protein results in a significantly greater and more prolonged anabolic response (lasting more than 12 hours) compared to 25 g of protein. The findings show a dose-response increase in protein absorption, muscle protein synthesis rates, and whole-body net protein balance, indicating that the human body's capacity to utilize ingested amino acids for tissue accretion is much higher than previously estimated.