: Drinking soy milk and eating sweet potatoes can be a good combination for breakfast. Soymilk is a nutritious drink rich in protein, vitamins and minerals, which is great for providing energy and meeting your nutritional needs in the morning. Sweet potatoes are a nutritious food rich in dietary fiber, vitamins and minerals, making them a healthy source of carbohydrates. Combining soy milk and sweet potatoes for breakfast provides a variety of nutrients, including protein, carbohydrates, fiber and vitamins. This combination provides long-lasting energy, helps keep blood sugar stable, and provides the nutrients your body needs.