Whey Protein and Increased Bloating

• Whey protein intakes up to 0.4g/kg body mass are well tolerated before a 10km run at 85% of race pace: a clinical trial.

  • 2026-01-20
  • Clinical Trial
  • Journal of the International Society of Sports Nutrition 23(1)
  • • Keely Shaw
    • Brynn Lindstrom
    • Amy Moss
    • Jill A Parnell

  • PubMed: 41556283
  • DOI: 10.1080/15502783.2026.2615270

  1 Insight on

  • Increased Bloating

  • High evidence
  • Athletes

  A significant increase in bloating severity was observed following the moderate-protein shake as compared to the low-protein shake during the run (0.54 vs 1.23; p = 0.03)

  Effect

  Harmful

  Effect size

  Small

  Significant

  Yes

  Dose

  0.4 g/kg body mass