Distributing protein intake evenly across meals throughout the day is associated with greater overall muscle protein synthesis over 24 hours compared to consuming the majority of protein in one meal, particularly in younger adults.

When protein is eaten in small amounts spread across meals, each meal triggers a strong but brief burst of muscle building by activating a key signal called mTORC1 through the amino acid leucine. After each meal, the muscle stops building because the cell gets overwhelmed with new proteins and shuts down further production to avoid errors. Eating all protein in one big meal causes the signal to peak early and then shut off too soon, leaving most of the day without muscle building. Spreading protein across meals resets this signal multiple times, allowing more total muscle building over 24 hours.