Yes, you can absolutely eat fruit without gaining weight, and fruits are a highly beneficial addition to a healthy and balanced diet. They provide you with vital nutrients such as vitamins and antioxidants that help your body function optimally. Fruits are also high in dietary fiber, which can help with weight management when consumed as part of a well-rounded diet.Yes, you can absolutely eat fruit without gaining weight, and fruits are a highly beneficial addition to a healthy and balanced diet. They provide you with vital nutrients such as vitamins and antioxidants that help your body function optimally. Fruits are also high in dietary fiber, which can help with weight management when consumed as part of a well-rounded diet.