Professor Tim Spector, epidemiologist and founder of Zoe Health, has shared a straightforward shopping tip that could help reduce your risk of type 2 diabetes and even offer protection against cancer. His advice? Swap common iceberg lettuce for more vibrant, bitter-tasting leafy greens that are rich in polyphenols.
Polyphenols are plant-based compounds renowned for their antioxidant and anti-inflammatory properties, which play a key role in supporting gut health. Unlike iceberg lettuce—one of the most popular lettuces in the US but nutritionally lacking—these colourful greens act as “rocket fuel” for beneficial gut microbes, encouraging their growth and diversity.
For instance, lollo rosso, an Italian curly loose-leaf lettuce, has up to 300 times more antioxidant potential than iceberg lettuce. Professor Spector recommends choosing a mix of different leaves, especially those with darker purple hues, to maximize polyphenol intake and promote a healthier gut microbiome.
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Zoe Health emphasizes that polyphenols not only help regulate blood sugar levels but also contribute to lowering the risk of heart disease and potentially protecting against cancer. Other polyphenol-rich foods include colourful fruits, vegetables, nuts like almonds, and dark chocolate.
While ongoing research continues to explore the effectiveness of polyphenol supplements, the safest and most beneficial way to incorporate them into your diet is by enjoying a variety of whole foods. Next time you shop, consider adding these nutrient-dense ingredients to your basket—something as simple as adding onions to your gravy or snacking on fruit and nuts can make a real difference to your long-term health.