What are the disadvantages of eating yam?
sensitive
The mucin contained in yam itself belongs to allergen, which is a kind of foreign protein. People with allergic constitution can't eat it, and children should eat less to avoid allergic phenomena.
Cause obesity
Yam contains a lot of starch, which is a kind of polysaccharide. It will eventually decompose into glucose in the body. If it is too much, it will lead to excessive accumulation of sugar in the body. If it cannot be consumed, it will turn into fat and accumulate in the body, causing obesity.
Cause throat discomfort
Raw yam contains a lot of alkaloids and saponin, which have a strong stimulating effect on skin and mucosa. If yam is not fully cooked, it may cause itching in the upper digestive tract such as mouth and throat.
Dietary taboos of yam
Yam can't be eaten with kansui.
Yam tonifies the kidney, strengthens the spleen and moistens the lungs. It can stimulate the intestine, increase intestinal peristalsis and produce purgative effect. The two effects are diametrically opposite and should not be taken together.
Yam can not be taken with alkaline drugs.
Yam contains amylase. When yam is taken with alkaline drugs, alkaline drugs will make the amylase in yam ineffective and reduce the nutritional value of yam.
Yam and pig liver can't be eaten together.
Yam is rich in vitamin C, and pig liver contains trace elements such as copper, iron and zinc. When vitamin C meets metal ions, it will accelerate oxidation and damage, which reduces the nutritional value. Therefore, it is not suitable to eat yam after eating pig liver.
Yam and cucumber can't be eaten together.
Cucumber contains vitamin C-decomposing enzyme. If it is eaten with yam, the vitamin C in yam will be decomposed and destroyed.
Yam and pumpkin can't be eaten together.
Pumpkin contains vitamin C-decomposing enzymes. If it is eaten with yam, vitamin C will be decomposed and destroyed, thus reducing the nutritional value of yam.
Yam and carrot can't be eaten together.
Yam is rich in vitamin C, while carrot contains vitamin C-decomposing enzymes. If they are eaten at the same time, vitamin C will be decomposed and destroyed.
Yam and squash can't be eaten together.
Cucurbita moschata contains vitamin C-decomposing enzymes, and yam is rich in vitamin C. If Cucurbita moschata and yam are eaten together, the vitamin C in yam will be decomposed and destroyed, which will lead to the reduction of the nutritional value of yam.
How to eat yam to have nutrition?
1, If you want to use yam for cooking, you can blanch it in boiling water and take it out immediately, so as to keep the crisp taste.
2. If you eat it steamed, you can steam the yam first and then peel it, which not only saves trouble, but also can better protect the protein, amylase and other nutrients contained in the yam.
3, if you want to use yam to stew, it is best to add it after the soup boils, and boil it quickly with fire, because yam contains polyphenol oxidase, which may brown when cooking, and adding it when boiling can destroy the activity of this enzyme. It should be reminded that yam contains more starch, so the amount of staple food should be reduced appropriately after eating to ensure the balance of calories.
Steamed yam with sausage
Practice: Chinese yam is peeled and cut into pieces, soaked in clear water to prevent oxidation. Sliced sausage. Spread the yam slices at the bottom of the bowl and stack the sausage slices layer by layer like lotus flowers. Steam in a steamer for about 40 minutes until the yam is crisp and rotten.