The number 1 cancer-fighting food is not a specific food, but rather a group of plant-based foods that contain phytochemicals. These foods include berries, broccoli, tomatoes, walnuts, grapes, and other vegetables, fruits, and nuts [1]. Research has shown that a diet filled with a variety of vegetables, fruits, whole grains, beans, and other plant foods helps lower the risk of many cancers [2]. Phytochemicals, which are found in plant-based foods, have been shown to have anti-cancer effects in laboratory studies [3]. Therefore, consuming a diet rich in plant-based foods that contain phytochemicals may help reduce the risk of cancer.
Sources:
https://www.aicr.org/cancer-prevention/food-facts/
https://www.cancer.gov/about-cancer/causes-prevention/risk/diet/vegetables-fact-sheet
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6077535/
Robert Morgan, Naturopath 