Phytochemicals, known to influence tumor development, are primarily found in which food categories?

Phytochemicals are naturally occurring compounds found in plants that have been shown to have protective effects against various diseases, including cancer. The primary food categories where phytochemicals are abundant include fruits, vegetables, and grains. These plant foods are rich in beneficial substances such as flavonoids, carotenoids, and polyphenols, which can help modulate cellular processes, reduce inflammation, and contribute to overall health.

Fruits and vegetables, in particular, are well-known for their high concentrations of vitamins, minerals, and antioxidants, which enhance the body's ability to fight off diseases. Whole grains also provide essential nutrients and phytochemicals that are beneficial for health and may help lower the risk of tumor development.

In contrast, dairy products, frozen foods, meat, poultry, and processed snacks generally contain fewer phytochemicals compared to plant-based foods. While some of these foods may contain beneficial nutrients, they do not typically provide the wide range of phytochemicals found in fruits, vegetables, and grains, making the latter the primary source for these protective compounds.