When is yam the most tonic in a day?

This should first talk about the role of yam. Yam is sweet and flat, and enters the lung, spleen and kidney meridians; Do not be bored; It has the effects of invigorating spleen and lung, invigorating stomach and kidney, strengthening kidney and essence, improving hearing and eyesight, helping five internal organs, strengthening bones and muscles, calming nerves and prolonging life. Therefore, if Chinese yam is used to supplement the spleen and stomach, it is best to use it at the fourth hour (9: 00 am to 1 1: 00 am); If the use of tonifying kidney and essence is considered, it is best to use it at unitary time (that is, from 5 pm to 7 pm); If it is used for chronic cough due to lung deficiency, it is best to use it in Yin Shi (3 am to 5 am). This is inferred from the meridian flow direction of traditional Chinese medicine. You can refer to it appropriately and don't be too rigid.