Does Taking Whey Protein Cause Stomach Problems or Diarrhea?

A blended drink that contains whey protein can serve as a meal replacement or provide valuable pre- or post-workout nutrition. For some people, however, this drink might lead to a sudden bathroom visit. Although whey protein affects everyone differently, a side effect of this product is a heightened risk of diarrhea or stomach discomfort.

Close-up of large whey pile. (Image: CobraCZ/iStock/Getty Images)

Side Effects Include Bloating and Diarrhea

Just as some people have adverse reactions to foods that don't affect the bulk of the population, some people report side effects of drinking whey protein. These side effects can include stomach bloating, excess gas, cramps and diarrhea. It's possible you might have an allergy or sensitivity to whey protein, but it's also possible you've consumed too much. Try lowering your next dose and noting the side effects. A typical dose of whey protein is 20 to 30 grams per day. If you're lactose-intolerant, look for a brand of whey protein labeled lactose-free. Whey protein isolate, for example, doesn't contain lactose.

REFERENCES & RESOURCES
Load comments
PARTNER & LICENSEE OF THE LIVESTRONG FOUNDATION

Copyright © 2019 Leaf Group Ltd. Use of this web site constitutes acceptance of the LIVESTRONG.COM Terms of Use , Privacy Policy and Copyright Policy . The material appearing on LIVESTRONG.COM is for educational use only. It should not be used as a substitute for professional medical advice, diagnosis or treatment. LIVESTRONG is a registered trademark of the LIVESTRONG Foundation. The LIVESTRONG Foundation and LIVESTRONG.COM do not endorse any of the products or services that are advertised on the web site. Moreover, we do not select every advertiser or advertisement that appears on the web site-many of the advertisements are served by third party advertising companies.