Chinese medicine has called walnuts "longevity fruit" since ancient times, and holds that walnuts can tonify the kidney and brain, tonify the middle energizer, and nourish the skin and blacken the hair. Walnuts are most suitable for mental workers, especially white-collar women, because these people often use their brains too much and consume sad blood. Eating walnuts regularly can replenish the brain, improve brain circulation and enhance brain power. At the same time, it also has the effect of blackening hair and smoothing skin. Because "the hair is bleeding" and the blood is black, walnuts are rich in vitamins (vitamin foods), which can improve the physiological activity of the skin, so it is a good beauty product for women (female food). In addition, happy young women must often eat walnuts in the first three months of pregnancy and be a good expectant mother.