Macadamias, hazelnuts, walnuts, almonds and pistachios are delicious for snacking! But these nuts can can also help put the brakes on colon cancer cell growth in vitro. Once fermented in the digestive system, the fibre they contain contributes to the production of butyrate, which promotes the health of the intestinal mucosa and exerts chemoprotective effects. Additionally, the activity of antioxidant enzymes such as catalase and superoxide dismutase were increased in nut treated samples, reducing the levels of cancer promoting reactive oxygen species. The nuts also significantly inhibited the growth of colon adenoma cells (polyps) and increased apoptosis (cell death). When it comes to chemoprevention, the nuttier the better!