Look: the appearance of mushroom meat is thick, the mushroom surface is smooth, the size is even, the mushroom pleats are tight and white, the mushroom handle is short and thick, and the edge is curled and thick. Yellow-brown or black-brown color is better, and good mushroom noodles will be slightly frosted.

Smell: It has a strong and unique aroma of mushrooms. Without fragrance, or with other strange and musty taste, the quality is poor.

Touch: dried mushrooms should be dried, and the water content should be 1 1%~ 13%. But it can't be too dry, and it will break when you pinch it. This quality is not good.

Kim Yeon-soo, a former medical columnist for Korea's Culture Daily, wrote in her book that Korean women must eat dried mushrooms every day. After a woman is over 50 years old, her waist will bend and her height will decrease. The best preventive measure is to supplement calcium and vitamin D to help calcium absorb in advance, and dried mushrooms are foods containing these two nutrients.

It should be reminded that the shiitake mushrooms here must be dried shiitake mushrooms exposed to the sun. This is because shiitake mushrooms contain ergosterol, which becomes vitamin D when contacted with sunlight, which can promote the normal growth and development of the body. After purchasing fresh shiitake mushrooms, spread them evenly on the newspaper, dry them in the sun, 1 time 1 handful, make tea after frying, and drink them every day. Nowadays, many dried mushrooms are directly processed by machines. Koreans often buy them and dry them again, which is safer.

Feng Lei, director of the Department of Health Management, School of Tourism Management, Zhejiang Forestry University, reminded that in addition to eating some dried mushrooms, you should eat more milk, bean products and small shrimp skins, so that calcium can be supplemented more fully. And more sunshine, vitamin D supplement is more adequate.

Dried mushrooms can be steamed, fried, braised or stewed, and it is best to match with meat. It should be noted that dried mushrooms are harsh on cleaning conditions, and improper operation will destroy their effective nutrients. When soaking dried mushrooms, wash the dust off their surfaces with water, and then soak them in warm water for about one hour, taking care not to soak them for too long. Then use your fingers to stir in one direction or shake the stem of the mushroom downward in the water to remove the sediment.