Jade liquid is the basic element of water alchemy and the key to alchemy. During the Ming and Qing dynasties, the jade liquid part of an alchemist was rarely handed down, but it was almost lost in modern times. Many schools of northern Zongdan law have no complete theory and method of returning jade liquid to Dan.

The magic test that jade liquid can achieve after being refined into Dan: wrinkles are reduced, ears are bright, all diseases are difficult to produce, white hair turns black, limbs are slender, abdomen and umbilicus protrude, teeth are regenerated, and skin is moist and firm. Many people intuitively think that jade liquid is human saliva. Why does saliva have such a great effect?

In fact, jade liquid is not ordinary saliva. Jade liquid is the essence of kidney, facing the liver, heart and lungs, and is the sublimation of five internal organs. Only practice can be obtained, and with the practice, there are more effective components in the jade liquid, which is a kung fu process from building the foundation to returning the jade liquid to Dan and refining the shape.

Ledao studied modern physiology, and compared the mechanism of jade liquid in empirical research, and found that the difference between jade liquid and ordinary saliva lies in the main components. Modern science has found that the parotid gland secretes a salivary growth hormone releasing peptide, which can regulate the secretion of growth hormone, promote human digestion and tissue growth, make muscles and skin grow flexibly, and at the same time enhance the immune system, making the human body less prone to illness.

After the foundation of the jade liquid is established, the yogi will feel the jade liquid flowing down the maxilla. In fact, in physiology, growth hormone releasing peptide is secreted from hypothalamus to parotid gland, and the duct secreted by parotid gland is just between Xuan Ying's point and maxillary second molar. When the yogi reaches the threshold of refining jade liquid, the yogi will feel a liquid Dan Zhu poured directly into his mouth from the center of his brain, and the Dan Zhu in his mouth is broken, which is the essence of parotid gland.

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In addition to parotid gland essence, the content of digestive enzymes in jade liquid is higher than that in ordinary saliva, which is why people who practice jade liquid successfully can cope with a lot of physical exertion with only a small amount of food. The high content of digestive enzymes and high digestion and absorption efficiency are also the main reasons for not eating for a long time.

For the infirm with long-term indigestion and absorption, you can practice the jade liquid regimen before eating, slowly swallow the food mixed with the secreted jade liquid, and gently touch Huangting District after eating. After three months, the digestive function will be greatly improved, and the muscles and skin will be moist and elastic.