Walnuts are recognized as a nut beneficial to the human body, rich in nutrients, such as protein, fat, carbohydrates and a variety of trace elements and minerals. Moderate consumption of walnuts can supplement the body’s nutritional needs, but not in excess, it is generally recommended that adults can eat about 4 a day, minors can eat 1-2 a day. Walnuts are rich in lipids, which are mainly unsaturated fatty acids. Unsaturated fatty acids contain linoleic acid and linolenic acid in the daily diet contains less, so you can eat walnuts to supplement the healthy metabolism of the body. Linoleic acid can help lower cholesterol to a certain extent; and the ingredients in linolenic acid can help prevent neurological decline in the brain, which is also helpful in improving a person’s memory and learning ability. Walnuts rich in protein into the body, after hydrolysis, can play a very good antioxidant effect. The carbohydrates contained in them are also a source of the energy needed by the body. Due to the high oil content within walnuts, excessive consumption of walnuts may lead to obesity; not only that, excessive consumption of walnuts may also lead to adverse symptoms such as fire, nausea, constipation and abdominal pain. Therefore, it is important to consume walnuts in moderation on a regular basis to avoid the above conditions.