Dietary Pattern and Cancer.

Diet play an important role in the development of cancer. A lot of research has been done on the role of individual nutrients or phytochemicals and cancer risk. Both harmful and beneficial associations of this nutrient have been observed with cancer. However, there is an interaction of individual dietary constituents to influence disease risk. On the other hand, examining the diet as a whole as is done in dietary patterns research may produce more accurate estimates and data that can be more easily translated into dietary recommendations. Dietary patterns and cancer research are becoming increasingly common in the epidemiology literature, and novel dietary patterns are being generated at a rapid pace. However, major issues remain over whether one general "healthy" dietary pattern can be suggested for cancer prevention or whether several diets should be advocated for different forms of cancer protection. It is challenging to study typical human diet in animal model that is appropriate for cancer prevention. Some dietary patterns, such as the ketogenic diet or macronutrient composition alteration, have been investigated more extensively in animal models than in humans in terms of cancer prevention, and bigger human observational studies are now needed to advise dietary guidelines. The question of whether to adapt nutritional guidelines to population subgroups based on susceptibility factors (for example, family history, sex, age, other lifestyle factors or comorbidities, metabolomics signatures, or microbiota-based profiles) is still open and will be crucial in moving the field forward.