Can I eat tomatoes with ulcerative colitis?
During a flare: CautionIn remission: Usually OK
Tomatoes are low FODMAP per Monash FODMAP testing, but their skins and seeds add insoluble fiber, and their acidity is commonly reported to aggravate symptoms. As a nightshade, tomatoes also contain small amounts of solanine; Cedars-Sinai notes there isn't solid evidence nightshades are harmful, though some people with inflammatory conditions choose to limit them.
During a flare
Peeled, deseeded, and cooked tomato (like a smooth sauce) is generally easier than raw tomato with skin and seeds during a flare.
In remission
Raw tomato is usually fine to reintroduce as tolerated once symptoms settle.
Ways to make it gentler
- peel and deseed if sensitive
- cook into sauce rather than eating raw during a flare
Safer swaps
cooked, strained tomato sauce
Sources
- When Superfoods and Inflammatory Diseases Are a Recipe for Trouble — Cedars-Sinai
- Eating more vegetables on a low FODMAP diet — Monash FODMAP
Last checked 2026-08-12
