Yam and sweet potato can be eaten together. Eating these two foods together will not affect your health. Yam has the effect of nourishing yin and yang and enhancing metabolism, while sweet potato is not only low in calories. It is high in vitamins and is rich in a variety of vitamins, which can help stimulate intestinal peristalsis. Yams and sweet potatoes can be cooked together and eaten as porridge, which will have higher nutritional value.