Phytonutrients, also known as phytochemicals, are plant-produced chemicals. Plants use phytonutrients to maintain their health. Some phytonutrients, for example, protect plants from insect attacks, while others protect against UV ray radiation. Humans who consume plant foods can benefit from phytonutrients as well. Colorful fruits and vegetables, legumes, nuts, tea, whole grains, and a variety of spices are all high in phytonutrients. They have an impact on human health but are not considered essential nutrients like carbohydrates, protein, fats, vitamins, and minerals.