Some protein bars may trigger digestive symptoms, gastroenterologist warns

Some protein bars can cause digestive symptoms, according to gastroenterologist Savita Srivastava.

The bars are widely seen as healthy snacks, but some contain ingredients that may upset digestion, especially when eaten regularly.

Added inulin can ferment quickly in the colon, producing gas and sometimes pain or bloating, particularly for people not used to eating much fiber.

Sugar alcohols such as erythritol, xylitol, sorbitol and maltitol may draw water into the intestine and contribute to diarrhea, gas and abdominal swelling.

Protein isolates and thickening gums may cause heaviness or nausea, while gastroenterologist Neelima Reddy says processed bars do not provide the same mix of nutrients as whole foods.

A study linked higher blood levels of erythritol with greater risk of heart attack and stroke, but its authors said this was an association, not proof that erythritol caused those outcomes.

Srivastava advises checking labels and choosing whole-food protein sources, such as seeds, egg whites or nut butter.