Yam is sweet and flat, and enters the lung, spleen and kidney meridians; It is not dry and greasy, and 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. It is mainly used for treating spleen and stomach weakness, listlessness, anorexia, chronic diarrhea, lung qi deficiency and dryness, phlegm and asthma, cough, kidney qi deficiency, soreness of waist and knees, weakness of lower limbs, thirst and frequent urination, nocturnal emission and premature ejaculation. Fresh yam is mostly used for fatigue, cough and thirst, and fried cooked food is used to treat spleen and stomach and kidney deficiency.

(1) Strengthening the spleen, benefiting the stomach and helping digestion

Yam contains amylase, polyphenol oxidase and other substances, which is beneficial to the digestion and absorption function of the spleen and stomach. It is a dual-purpose product of medicine and food that blindly tonifies the spleen and stomach. Both spleen yang deficiency and stomach yin deficiency can be eaten. Clinically, it is often used with Weichang Decoction to treat spleen and stomach weakness, anorexia, fatigue, diarrhea and other diseases.

(2) Nourishing kidney and nourishing essence

Yam contains a variety of nutrients, which have the functions of strengthening the body, nourishing the kidney and benefiting essence. Generally speaking, nocturnal emission due to kidney deficiency, leukorrhagia in women, frequent urination and other symptoms can be taken.

(3) benefiting lung and relieving cough

Yam contains saponin and mucilage, which has the function of lubrication and moistening, so it can benefit lung qi, nourish lung yin and treat lung deficiency, phlegm and chronic cough.

(4) lowering blood sugar

Yam contains mucin, which has the function of lowering blood sugar. It can be used to treat diabetes and is a good food for diabetics.

(5) prolong life

Yam contains a lot of mucin, vitamins and trace elements, which can effectively prevent the deposition of blood lipids on the blood vessel wall, prevent heart disease, and achieve the effects of benefiting the mind, calming the nerves and prolonging life.