Increase vegetable variety, not just volume

Eating 5–10 different vegetables per week is more anti-inflammatory than eating large amounts of two or three.

Why it works

Different vegetables supply different polyphenol classes — flavonoids, carotenoids, glucosinolates, anthocyanins — that modulate different inflammatory pathways. Polyphenols act as signaling molecules for gut bacteria as well as having direct anti-inflammatory properties; variety ensures broad-spectrum coverage of the microbial niches that produce short-chain fatty acids with anti-inflammatory effects. Volume matters, but diversity is an independent predictor of microbiome richness and inflammation markers.

How to do it

1. Count how many distinct vegetables you eat in a typical week; aim to add one new variety every two weeks.
2. Include both cooked and raw forms — some phytonutrients are better absorbed from cooked; others from raw.
3. Use color as a proxy for polyphenol diversity: aim for three or more different colors on the plate.
4. Frozen vegetables count fully — they are often nutritionally superior to fresh produce stored for days.

Evidence

Polyphenol intake from diverse plant foods is associated with lower inflammatory markers in observational studies. Gut microbiome diversity is associated with vegetable variety in multiple cohort studies. (observational)

Observational; diet quality is confounded by socioeconomic status, physical activity, and other lifestyle factors.

Sources

• Carlson et al. (2019), Dietary fiber and gut microbiota composition, Nutrients (plant food diversity and microbiome)

Common mistake

Eating large servings of a few favored vegetables (e.g., iceberg lettuce, cucumber, potato) without expanding variety, missing the polyphenol breadth that drives anti-inflammatory effects.