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Whey protein

Evidence does not establish that protein must be consumed within one hour of exercise.

moderate evidence

Direction: no clear effect

Magnitude: unknown

Human evidence reviewed

Study context

Population: Exercising adults

Studied dose: Varies or not established

Duration: Varies across reviewed studies

Last reviewed: 2026-09-16

Limitations & caveats

  • This does not mean timing is irrelevant in all contexts.

Sources

NIH ODS: Dietary Supplements for Exercise and Athletic PerformanceExpert or government fact sheet · NIH Office of Dietary Supplements · supportsOpen ↗

Source type and claim strength are separate. A fact sheet summarizes underlying research; its link is not an individual clinical trial.