Raw walnuts can be eaten directly. Usually, walnuts can be eaten raw or cooked in porridge or fried. Raw walnuts and cooked walnuts can have some changes in composition and produce some differences in effects. Raw walnuts can be eaten directly to help nourish the brain, while cooked walnuts can be eaten to help nourish the liver and kidneys. Research shows that walnuts contain a large amount of phospholipids and a variety of trace elements, phospholipids for brain nerves can play a certain maintenance role, and a variety of trace elements for the brain tissue cell structure is an important source. In addition, walnuts contain more fat and mostly unsaturated fatty acids, which have the effect of slowing down the aging of the brain, and raw walnuts can be eaten directly to better retain these nutrients. Therefore, raw walnuts have a certain effect on the brain, for people who often use their brains, such as teenagers, students, brain workers, etc. can be appropriate to eat. It should be noted that walnuts should not be consumed too much at one time, it is recommended not to consume more than 5 a day, too much consumption may affect the gastrointestinal digestion and absorption function, and even lead to bloating, nausea, indigestion and other symptoms. People who are allergic to walnuts should avoid eating them, and people with allergies can first undergo allergen testing to avoid allergic reactions and uncomfortable symptoms after consumption.