Phytonutrients as a Therapeutic Modality: An Overview

Phytonutrients in plants play a great role in their protection against certain bacteria, viruses, and fungi resulting from certain detoxification processes within the plant. There are many recommendations to increase the intake of high amounts of fresh colored vegetables and fruits, besides whole grains (cereals) and beans, which contain phytoconstituents to lower the risk of certain cancers, diabetes and hypertension, in addition to certain heart diseases. The effect of phytonutrients differs according to their chemical class and amount. They may act as antioxidants which prevent the effect of carcinogens on the healthy body. The sources constituents and mechanisms of the phytonutrients are summarized in this chapter.