Why are walnuts called "longevity fruit"? What are its functions?

Walnuts are a common nut food in life. As we all know, walnuts have very high nutritional value. Traditional Chinese medicine even calls walnuts the "longevity fruit." In addition, as a good brain supplement, walnuts are of great help to children's intellectual development and fetal development.

But in fact, although walnuts can be considered to have certain beneficial effects on the brain, which are also provided by the polyunsaturated fatty acids in them, this effect is not outstanding and is not worthy of professional attention. For this purpose, eat walnuts intentionally. Many other dried fruits contain polyunsaturated fatty acids like other foods. It can also be said that they have this effect, and they are not inferior to walnuts. Some opinions that "the neurotransmitters contained in walnuts are conducive to the development of brain nerves" are not very reliable, because the components of neurotransmitters cannot be supplemented by food, and it does not matter how much you eat. Likely to have digestive effects on the human brain.

Eating walnuts can improve the human digestive tract. The human body absorbs the cellulose and oleic acid in walnuts, which is beneficial to improving the human gastrointestinal tract, promoting the digestion and absorption of food, and reducing gastrointestinal tract in the human body. Cholesterol promotes gastrointestinal peristalsis. Walnuts are a kind of edible fruit. They have the same characteristics as nuts. They are rich in fat and are very fragrant after being fried. However, they should not be eaten in excess. Do not eat more than 5 walnuts a day. If you eat too much, you will have diarrhea.

Among them, polyunsaturated fatty acid~a-linolenic acid is very rich. a-linolenic acid and DHA, a conversion substance in the body, are very important to the growth of human brain and eye vision in early life (fetal period, infant period). Development is critical. The "Infant and Young Child Feeding Guidelines" of China Nutrition Institute recommends the use of walnut oil when adding complementary foods to infants and young children. For people who often use their brains and children who have grown taller, eating more walnuts is advantageous. The fat content in walnut kernels is very high, reaching 60-80%, and half of the weight of the human brain is composed of fat. Therefore, there is nothing wrong with eating walnuts to strengthen the brain.

The official name of walnut is recorded as Juglans walnut in the "Fora of China", which is a plant of the genus Juglans in the Juglandaceae family. In China, it is commonly planted in North China, Northwest China, Southwest China, Central China, South China, and East China. Walnut cultivation has a long history in my country, which can be traced back to 2,000 years ago. It is the core and production center of walnuts. At present, there are more than 40 varieties planted, and the total planting area and production volume rank first in China.