This is mainly because the "ω-3 polyunsaturated fatty acids" rich in walnuts are the necessary components of phospholipids, an important substance that forms brain cell membranes. At the same time, phospholipids also participate in the formation of neurotransmitter "acetylcholine", which is like a messenger that transmits signals between nerve cells. Without it, the reaction speed will be slow and the memory will decline. In addition, walnuts are also rich in vitamin E. Besides sunflower seeds, walnuts are common nuts. Vitamin E can prevent lipid peroxidation of brain cells and maintain the health and vitality of brain cells. Therefore, there is a certain basis that walnuts can promote brain health.
However, these nutrients are not patented by walnuts, but also many other nuts, such as hazelnuts and pine nuts, all of which have similar nutrients to walnuts. In addition, studies have shown that green leafy vegetables rich in antioxidants, fruits rich in anthocyanins, deep-sea fish rich in DHA and algae are also food categories that are conducive to preventing brain aging.
So, don't be obsessed with eating walnuts. A balanced and nutritious diet is more conducive to brain health. Pay attention to the types of food, eat more fresh fruits and vegetables, milk and soybeans, and eat fish, poultry, eggs, lean meat and nuts in moderation. Walnut can be regarded as one of the daily shares of nuts. Dietary Guidelines for China Residents recommends eating 50-70g nuts per week, which is equivalent to about 10g per day. If you eat about two walnuts, that's enough. After all, nuts are high in fat and calories, and eating too much is easy to gain meat.
In addition, it should be noted that walnuts on the market are mostly fried, baked or fried, and extra salt, sugar and oil will be added during processing. Salted walnuts and amber walnuts belong to this kind of walnuts. It tastes delicious, but the nutritional value is greatly reduced because of the addition of oil, salt and sugar. In contrast, directly shelled walnut kernel is healthier than fried walnut kernel, because it does not add sugar, salt and oil, and has not been treated at high temperature, but shelling will destroy the seed coat of walnut kernel, expose fat directly to oxygen, and also make fat oxidative rancidity. Therefore, if you can, buy some walnuts with shells and peel them yourself, which can not only retain nutrition, but also prevent eating too much. After all, shelling is laborious.
Finally, once again, adequate sleep, a balanced diet and moderate exercise, a healthy diet and lifestyle are the correct ways to replenish the brain ~