Yam is a dioscoreaceae plant, which is different from Solanaceae potato in that it is toxic when germinated. After sprouting, yam does not produce toxin and is edible.

However, the germination process of yam will consume the stored nutrients, so the nutritional value of yam after germination will be reduced, so the yam purchased should be eaten as soon as possible, not put into germination. When buying yam, don't choose yam that has sprouted.

2 How to deal with the long buds of yam 1. Cut off the sprouting position and continue to eat. Wash the yam, cut off the sprouted part of the yam, then peel and clean it, and you can start cooking. There are many ways to make yam, which can be fried with vegetables, fried with meat and stewed in soup.

2. After the yam planted in the soil germinates, if it happens to be in spring and the temperature is 13- 14 degrees, you can cut the germinated yam into small pieces of about150g, dig a pit with a depth of 7-8cm, pour water through it, and then bury the part with sprouted eyes in the pit, cover it with soft soil.

3 How to choose good quality yam 1. Selection method of crisp yam The skin of crisp yam is smooth and has no pockmarks, which is suitable for frying or stewing soup. Choose big ones, fresh ones with cuts at both ends, and white ones with yam meat. Don't buy yam that is too small, with yellow meat, black skin and water marks on the surface.

2. Selection method of noodle yam The surface of noodle yam is pockmarked and hairy, and it tastes soft, suitable for steaming or stewing soup for dessert. In appearance, it is necessary to choose those with no bumps on the surface, which will be hard-hearted and not delicious; Choose those with white meat and sticky juice, and those with yellow and red meat are not fresh.

4 The harm of eating yam is a kind of food rich in starch. Under normal circumstances, it is harmless to eat it in moderation, and the nutritional value of yam is very high. After eating, it has the effects of tonifying kidney and benefiting qi, strengthening spleen and nourishing stomach, stabilizing blood sugar and improving immunity.

But some special people may have disadvantages after eating yam:

1. Constipation crowd: Yam itself has astringent effect, and people with dry stool and constipation may aggravate the situation by eating yam frequently.

2. People who eat too much and don't digest: Yam itself is rich in starch. If you eat too much and don't digest it, don't eat yam often, which will aggravate indigestion, bloating and gastrointestinal discomfort.

3. Patients with gynecological tumors: Yam contains dioscin, which can promote hormone synthesis. Gynecological tumors are not suitable for eating, which is unfavorable to the condition.