Examples: Spinach, kale, Swiss chard, collard greens, arugula, romaine
What the research shows: Dark leafy greens are nutritional powerhouses, rich in folate (essential for DNA synthesis and repair), carotenoids (antioxidants that protect cells), fiber, and flavonoids (anti-inflammatory compounds).
The AICR includes leafy greens in their list of foods studied for cancer prevention, noting they supply vitamins and protective plant compounds . Population studies consistently show that higher intake of leafy greens is associated with lower risk of breast, colorectal, and lung cancers.
How to eat more:
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Add a handful of spinach to smoothies (you won't taste it)
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Use kale or chard in soups and stews
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Make salads the main event
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Sauté greens with garlic and olive oil as a side
5. Legumes (Beans, Peas, and Lentils)
Examples: Black beans, kidney beans, chickpeas, lentils, pinto beans, peas
What the research shows: Legumes are rich in fiber, protein, and a variety of phytochemicals that support healthy gut bacteria, help maintain healthy weight (they're highly satiating), reduce inflammation, and may lower risk of colorectal cancer.
Data from the Adventist Health Study showed that eating beans twice a week can lower colon cancer risk by 42%, and eating them three times a week could slash prostate cancer risk by 47% . The AICR also notes that fiber has probable evidence for decreasing colorectal cancer risk .
How to eat more:
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Add beans to soups, stews, and chili
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Use lentils in place of ground meat in pasta sauce
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Make hummus for snacks and sandwiches
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Toss chickpeas into salads or roast for a crunchy snack
6. Garlic, Onions, and Alliums
Examples: Garlic, onions, leeks, shallots, scallions, chives
What the research shows: Allium vegetables contain organosulfur compounds that enhance the body's detoxification systems, reduce inflammation, and may inhibit cancer cell growth.
Population studies suggest that higher intake of allium vegetables is associated with reduced risk of stomach, colorectal, and esophageal cancers. Crushing garlic and letting it sit for a few minutes before cooking allows more allicin to form, which may preserve more of its beneficial properties . Already used daily in many cuisines, this is a habit worth keeping.
How to eat more:
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