The nutrient most abundant in fruits and vegetables is water, but if considering macronutrients, dietary fiber stands out. Fruits and vegetables are excellent sources of dietary fiber, which aids in digestion, helps maintain a healthy weight, and lowers the risk of chronic diseases. Fiber-rich foods can promote feelings of fullness, regulate blood sugar levels, and support gut health. Additionally, these foods are rich in vitamins, minerals, and antioxidants, making them essential for a balanced diet and overall health, thereby enhancing the benefits of dietary fiber in nutrition.