Vegetables are essential for a healthy diet as they provide a wide range of nutrients, including vitamins, minerals, fiber, and antioxidants. They are low in calories yet high in nutrients, which contributes to maintaining a healthy weight. The fiber in vegetables aids in digestion, promoting satiety and regulating blood sugar levels. Additionally, regular consumption of a variety of vegetables can lower the risk of chronic diseases such as heart disease, stroke, and some cancers, making them a fundamental part of a nutritious eating plan.