From a nutritional point of view, the nutritional value of fresh walnuts is higher than that of dried walnuts, but from the point of view of the efficacy and usefulness of walnuts, there is not much difference between the two. A. Nutritional perspective 1. Fresh walnuts: Fresh walnuts are walnuts that have not been dried and processed. The amino acid content is higher than that of dried walnuts because fresh walnuts have not undergone any processing and can highly retain nutrients. The main nutrients in fresh walnuts are amino acids, protein, fat (higher content of unsaturated fatty acids), vitamin B, minerals (calcium, iron, phosphorus, etc.); 2. Dried walnuts: dried walnuts will be damaged to a certain extent during the drying process after a series of treatments such as high temperature, light and ventilation, resulting in the loss of nutrients, but, overall, except for the amino acid content of fresh walnuts compared to dried walnuts However, in general, except for the amino acid content of fresh walnuts, which is higher than that of dried walnuts, the other nutritional values are similar. Although fresh walnuts have a higher nutritional content than dried walnuts, fresh walnuts are seasonal and have a shorter shelf life, so it is recommended to choose dried walnuts for consumption. Second, the efficacy and role of the first, whether fresh walnuts or dried walnuts, the most prominent effect is the antioxidant, walnuts are rich in amino acids can slow down the aging of blood vessels. Secondly, walnuts are rich in fat, protein, B vitamins and other substances, with brain, antibacterial and other effects, walnut oil also has the effect of relieving vascular pressure, which can help the body cope with external stress and thus reduce the incidence of depression. In addition, walnuts also have the effect of preventing stroke, improving memory and darkening hair.