Diet, Cancer, Bones, and the Mind

The World Cancer Research Fund and American Institute for Cancer Research estimate that roughly 30 to 40 percent of the most common cancers could in principle be prevented through diet, physical activity, and maintaining a healthy body weight, based on the accumulated evidence from large cohort studies and mechanistic research. Protective dietary factors identified across this evidence base include fiber intake and diets rich in fruits and vegetables, which supply antioxidants and other phytochemicals, while established risk factors include excess body fat, now linked to at least thirteen distinct cancer types, alcohol consumption at any level, and processed meat intake. Establishing causation for any single food in relation to cancer risk is genuinely difficult in nutritional epidemiology, since diets are consumed as complex patterns over decades and are entangled with numerous other lifestyle and socioeconomic factors, which is why researchers place more confidence in findings that are consistent across whole dietary patterns than in claims about any one food in isolation.