A diet rich in fruits and vegetables positively affects longevity by providing essential nutrients, including vitamins, minerals, and antioxidants, which promote overall health. These foods are typically low in calories and high in fiber, aiding in weight management and improving disease resistance. Consuming a variety of fruits and vegetables can help lower the risk of chronic diseases like heart disease, diabetes, and certain types of cancer. Additionally, their high water content contributes to hydration and overall well-being, factors associated with increased lifespan.