The human body was also divided into yin and yang and five elements. If one of the five elements was missing, one would get sick and might not live for long. Therefore, the best spirit root was not a single spirit root, but a spirit root with all five elements. However, there were one or two kinds of spirit roots that were more prominent than the others, but not too prominent. Otherwise, the five elements would be uneven, and one would get sick. He had to pay attention to the balance of the five elements in his body. Otherwise, if the five elements were really uneven, it would be a very troublesome thing for cultivators.