
Is Onion Inflammatory?
Onion has an inflammation score of 2/10, making it anti-inflammatory. This food actively helps reduce inflammation in your body.
Why Is Onion Anti-Inflammatory?
Onions are rich in quercetin, one of the most potent natural anti-inflammatory flavonoids. They also contain sulfur compounds, chromium, and vitamin C that work together to reduce inflammation.
Key Anti-Inflammatory Properties
- Very high in quercetin flavonoid
- Rich in sulfur compounds
- Contains chromium for blood sugar control
- Prebiotic fiber feeds gut bacteria
Things to Watch Out For
- Can cause digestive discomfort
- Raw onion may irritate IBS sufferers
Key Nutrients in Onion
Onion contains several notable nutrients that influence its inflammatory profile:
Serving Recommendation
Recommended Serving Size
1/2 medium onion
Tips
Red onions have the most quercetin. Cook lightly to preserve anti-inflammatory compounds.
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Understanding how onion affects inflammation is important for anyone following an anti-inflammatory diet. With an inflammation score of 2 out of 10, onion is classified as anti-inflammatory in the Flammy food database.
Including onion as part of a balanced anti-inflammatory diet can help reduce chronic inflammation, which is linked to conditions like heart disease, diabetes, arthritis, and certain cancers. The anti-inflammatory compounds in onion work by reducing inflammatory markers like C-reactive protein (CRP) and pro-inflammatory cytokines.
The inflammation score is based on a comprehensive analysis of the food's nutritional profile, including its fatty acid composition, glycemic impact, antioxidant content, and the presence of pro-inflammatory or anti-inflammatory compounds. Scores range from 1 (most anti-inflammatory) to 10 (most inflammatory).

