Professor Tim Spector, a renowned epidemiologist and founder of Zoe Health, has shared a simple yet powerful tip for supermarket shoppers that could help lower their risk of diabetes and protect against cancer. In a recent social media post, he emphasized the importance of choosing colorful, bitter-tasting greens over the common iceberg lettuce, which he describes as nutritionally "useless."
The Power of Polyphenols
Polyphenols are natural compounds found in plants that boast antioxidant and anti-inflammatory properties. These substances act as "rocket fuel" for gut microbes, promoting the growth of beneficial bacteria and supporting overall health. According to Zoe Health, polyphenols can help control blood sugar levels, reduce the risk of type 2 diabetes, lower the chance of heart disease, and may even protect against cancer.
Iceberg Lettuce: A Poor Choice
Spector highlighted that iceberg lettuce, one of the most commonly consumed vegetables in the US, contains almost no polyphenols. In contrast, lollo rosso, an Italian curly loose-leaf lettuce, has 300 times more antioxidant potential. He advises shoppers to opt for darker purple varieties of leaves to maximize polyphenol intake.
Foods Rich in Polyphenols
To boost polyphenol consumption, Spector recommends adding a variety of foods to your shopping list, including:
- Cocoa powder and dark chocolate
- Berries such as black elderberry, black chokeberry, blackcurrant, sweet cherry, black grape, highbush blueberry, lowbush blueberry, strawberry, and red raspberry
- Fruits like plum, prune, and apple
- Beverages including red wine, coffee (filter), and black tea
- Spices and herbs such as cloves, common sage (dried), green tea, celery seed, rosemary (dried), curry powder, common thyme (dried), peppermint (dried), capers, star anise, ginger (dried), lemon verbena (dried), common thyme (fresh), Mexican oregano (dried), spearmint (dried), and sweet basil (dried)
- Nuts and seeds like flaxseed meal, pecan nut, roasted soybean, almond, chestnut, soy yogurt, and hazelnut
- Olives (black and green) and vegetables such as globe artichoke heads, red chicory, green chicory, red onion, shallot, spinach, and yellow onion
Simple Ways to Incorporate Polyphenols
Adding these foods to your diet can be easy. For instance, include onions in your gravy during a Sunday roast, snack on almonds and a handful of fruit with some dark chocolate, or choose a mix of different leafy greens for your salad. Spector notes that increasing plant diversity in your diet may help enhance the diversity of your gut microbiome.
Caution on Supplements
While polyphenols offer numerous health benefits, more research is needed to confirm the safety and effectiveness of polyphenol supplements. The best approach is to obtain them through a varied diet rich in colorful fruits, vegetables, and other whole foods.
