Can I eat lentils with ulcerative colitis?
Like other legumes, lentils contain fermentable GOS carbohydrates that can trigger gas and bloating in sensitive guts; Monash FODMAP testing shows tolerance is dose-dependent, with small servings (roughly 1 ounce boiled, more for canned/drained) being lower in FODMAPs than large portions. UK patient guidance lists lentils as a healthy protein alternative to red or processed meat and part of a fiber-containing balanced diet.
During a flare
Well-cooked, small portions of lentils (for example in a soup, blended or otherwise) are more likely to be tolerated than large servings during a flare; some people still find them gas-producing and prefer to hold off until symptoms settle.
In remission
Reintroduce gradually and pay attention to serving size, since tolerance for lentils and other legumes varies a lot from person to person even outside a flare.
Ways to make it gentler
- Cook until very soft and start with small portions (about 1 ounce boiled)
- Rinse canned lentils well before eating
- Try red lentils, which break down softer than other varieties
Safer swaps
tofu · eggs · lean meat or fish
Sources
- Including legumes on a low FODMAP diet — Monash University FODMAP
- Food and Crohn's or Colitis — Crohn's & Colitis UK
Last checked 2026-08-12
