Yam, or yam, is also known as Huai yam, Huai yam, native yam, yam, yam, and Yuyan. Herbs perennial, with vines that are often purple, tuberous, cylindrical, leaves opposite, oval or oval, flowers milky, dioecious. The roots contain starch and protein and can be eaten. Monocotyledonous plants, 10 genera and 650 species, are widely distributed in temperate and tropical regions of the world. There are about 80 species of Dioscorea in China. Originating in Shanxi Pingyao and Jiexiu, they are now distributed in various provinces and autonomous regions of Jiangxi in North China, Northwest China, and the Yangtze River Basin.
Nutritional content of yam
Content (per 100 g)
Content (per 100 g)
Vitamin D (D2 + D3)
0 international units
saturated fatty acid
Monounsaturated fatty acid
Polyunsaturated fatty acids
The efficacy of yam
Anti-arthritis, nourishing the lungs and nourishing the kidney, nourishing the kidney and strengthening yin, diabetes, abdominal distension, weakness after illness, diarrhea, nourishing lungs and cough, lowering blood sugar, prolonging life, resisting liver coma, nourishing kidney and nourishing essence, strengthening spleen and stomach, helping digestion
How to pick yam
First, we must weigh the yam of the same size, the heavier is better. Secondly, look at the hairs. The more yam of the same breed, the better. The more beards, the more yam tastes, the more yam polysaccharides are, the better the nutrition is. Finally, look at the cross-section. The cross-section of yam should be snow-white, which means it is fresh. If it is yellow and rusty, do not buy it.
Note: If you have abnormal spots on the surface, you cannot buy yam because it may have been infected. It should also be noted that the cross section of yam should be mucous and the skin should not be damaged. Yam is afraid of freezing and heat. When buying yam in winter, you can hold it for about 10 minutes. If yam is sweating, it will be frozen. When viewed from the open, the frozen yam cross-section mucus will turn into water, have a hard core, red flesh, and poor quality.
Brine prevents yam from turning black
Immediately soak the yam in salt water to prevent oxidation and blackening;
Be careful when cutting yam
When fresh yam is cut, it will have mucus, which can easily hurt your hand. You can wash it with water and a little vinegar to reduce mucus. Yam skin can easily cause skin irritation, so it is best to use peeling method, and do not touch the hand after shaving yam, wash your hands a few times immediately, otherwise it will scratch it wherever you go