How a Cancer Researcher's Diet Fights Gut Damage and Tumor Growth

Susan Bullman, a researcher at MD Anderson Cancer Center, has found that diet plays a key role in gut health and cancer risk. Her studies suggest ultra-processed foods may harm the gut, while high-fibre meals could help prevent certain cancers. She follows a carefully planned diet to support her own health. Bullman begins each day with oatmeal and fruit, which provides around 12 grams of fibre. For lunch, she often chooses chicken salad topped with chia or pumpkin seeds. Dinner usually includes a palm-sized portion of grilled chicken or beef, paired with fibre-rich vegetables and whole grains.

She avoids heavily processed high-protein products, preferring natural protein sources like chicken. Fermented foods, such as kefir, are also a regular part of her diet, as they help strengthen the gut microbiome.

Her research highlights the dangers of ultra-processed foods, which may disrupt gut health and allow harmful microbes to enter the bloodstream. This can trigger inflammation and even promote tumour growth. In contrast, fibre-rich foods like lentils, beans, and whole grains nourish beneficial gut bacteria. The USDA recommends women consume 25 grams of fibre daily, while men should aim for about 38 grams. Bullman's findings suggest that a diet high in fibre and fermented foods may reduce the risk of colorectal and oral cancers. By focusing on natural, unprocessed foods, she aims to maintain a healthy gut and lower cancer risk. Her research reinforces the importance of dietary choices in long-term health.