Phytochemicals are bioactive compounds found in fruits and vegetables that play a crucial role in promoting health. They contribute to the prevention of certain diseases through their antioxidant and anti-inflammatory properties. Phytochemicals also support the functioning of the immune system and may improve cardiovascular health. Various types of phytochemicals, such as flavonoids and carotenoids, are associated with lower risks of chronic illnesses, including cancer and heart disease. Including a variety of colorful fruits and vegetables in one's diet maximizes the intake of these beneficial compounds.