The difference between dry walnut and wet walnut Dry walnut: Walnut fruit has a "post-ripening" process, and only through the process of ripening and drying can the complete transformation of the internal substances of walnut fruit be further completed. Of course, dried walnuts should also be eaten during the shelf life, otherwise it will go bad, and the harm will be great. Even walnuts infected with Aspergillus flavus will have a strong carcinogenic effect. Fresh (wet) walnut: Many urbanites don't know what's going on with this kind of fresh (wet) walnut. They thought it was just picked from the tree and still had a layer of green skin. Actually, this is not the case. After the green skin is removed, it looks the same as the dried walnut, except that the meat inside is fresh and tastes better. Many pregnant women like it best because it is very nutritious. Fresh walnuts, the skin is easy to tear off. If walnuts are left too long, the skin won't tear off easily. I know two ways, you can have a try. First, you put the walnut kernel in hot water for a while, and it's easy to tear off the skin when it's hot. The second is to buy walnuts back and put them in the refrigerator. Take out as much as you want, and the skin is easy to tear off. Unlike ordinary dried walnuts, this walnut is characterized by freshness, crispness, sweetness, no oil, no greasy and so on.
The protein content of fresh walnut and dry walnut is not far from that of wet walnut. But after a period of storage, you will find that the difference is obvious. The amino acid content, essential amino acid content and other amino acids content of fresh walnut are higher than that of dry walnut. Therefore, the loss of amino acids is greatly accelerated by the influence of high temperature, light and ventilation during drying. It is often said that walnuts are similar to our human brain, so they have the function of nourishing the brain. In fact, fatty acids such as EPA and DHA in fat have an educational effect on us. So what is the difference between fresh walnuts and dried walnuts? In fact, the fatty acid composition of dried walnuts and fresh walnuts is the same, and there is not much difference in their fatty acids after being stored in the same way for a period of time, so drying has little effect on the fatty acid content of walnuts during storage.
After such a comparison, we can easily find that the nutritional value of fresh walnuts is slightly higher than that of dried walnuts, but the main problem of fresh walnuts is storage, because it is easy to get moldy during storage, so we must pay attention to whether it is really fresh when buying fresh walnuts. People who buy baskets on the street now are generally fresh and don't buy more, because too much walnuts will cause excess energy.
How to choose high-quality walnuts When choosing walnuts, we must pay attention to and compare more. Walnuts with a big round shape, thin and white shell, high kernel yield, dry, large peach kernel slices, white color and high oil content are better. The selection method should be mainly based on observation of wenwan walnut kernel. The fullness of nuts is the best, and the dryness is the second; The color of kernel clothes is yellow and white, followed by dark yellow; Brown and yellow are worse, and the quality of "tiger walnut" with dark brown spots is not good. So we must master the selection method of walnuts.