2, yam, yam, alias yam, yam, yam, yam, yam, yuyan. Perennial herb with creeping stems, usually purplish, cylindrical roots, opposite leaves, oval or oval flowers, and dioecious.

1. Spleen and stomach, help digestion: Yam contains amylase, polyphenol oxidase and other substances, which is beneficial to the digestion and absorption function of the spleen and stomach. Blindly nourishing the spleen and stomach is a dual-purpose product of medicine and food. 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 symptoms.

2. Bushen Yijing: Yam contains a variety of nutrients, which has the functions of strengthening the body, tonifying the kidney and replenishing essence. Generally speaking, symptoms such as nocturnal emission due to kidney deficiency, leukorrhagia by women and frequent urination can be taken.

3. Benefiting lung and relieving cough: Yam contains saponin and mucus, which has the function of lubricating and moistening dryness, so long-term consumption can benefit lung qi, nourish lung yin, treat lung deficiency, excessive phlegm and cough.

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

⑤ Longevity: 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 heart, calming the nerves and prolonging life;

6. Anti-hepatic coma: In recent years, it has been found that yam has sedative effect and can be used for anti-hepatic coma.