Propionic acid

Studies in people

• Benefit

  Immune cell changes²

  In people with MS, taking propionic acid raised helpful immune cells and lowered relapse rates over three years.

• Benefit

  Food allergy immune response³

  People with food allergies had less propionic acid in their blood, and it helped keep immune cells steady in mice.

• Open question

  Blood sugar control⁴

  In 28 healthy adults, propionic acid raised glucagon and norepinephrine, but not blood sugar.

Animal and lab studies only

• Concern

  Gut bacteria in Crohn's disease⁵

  In mice and lab dishes, propionic acid made Crohn's-linked gut bacteria harder to kill and more harmful.

The signal at the top counts the findings in people and in animal and lab studies. A concern in studies of people outranks animal and lab studies, and “No concerns” needs at least one finding in people. When most findings in people point one way, the page leans that way (“Mostly”), and every finding is still shown. Findings whose study type is not stated are shown but not counted. This page is a reference, not medical advice. It describes what regulators and published research say. Talk to a doctor or dietitian about your own diet.