What to Eat for Cancer Prevention: The Total Dietary Pattern as a Combination Treatment for Prevention.

Over the past 2 decades, the search for dietary factors for developing cancer prevention guidelines has led to a significant expansion in the study of dietary patterns and their relation to cancer. Dietary patterns, which consider the types, amounts, variety, and combination of consumed foods, may encompass additive, synergistic, or interactive effects on human health, compared with individual nutrients or foods. In this review, we discuss the history and methodologies of dietary pattern research, describe common dietary indices used in cancer research, and summarize the existing evidence on dietary patterns and cancer risk. Current evidence supports the beneficial role of dietary patterns that are rich in vegetables, legumes, whole fruit, and whole grains and limited in added sugars, refined grains, processed foods, and red and processed meat in preventing various cancers, including breast, colorectal, and prostate cancers. Additionally, emerging evidence suggests that dietary patterns based on biological mechanisms, such as hyperinsulinemic diet and inflammatory diet, hold promise and may be priority areas for future research.

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