Although walnuts are rich in nutrition, but they contain more fat, consuming too much may cause overweight and obesity, so it is not recommended to eat a lot of them, to 2-3 per day is the best. Walnuts are a common nut in daily life, rich in protein, fat, minerals and vitamins, the benefits of consuming walnuts, mainly including nourishing Qi and blood, nourishing Yin and kidney, brain and brain. The unsaturated fatty acids in walnuts, which have a cholesterol-lowering effect, can protect the heart and blood vessels and prevent atherosclerosis. Vitamin E in walnuts has antioxidant effect to avoid oxidative damage to the skin by free radicals and is good for hair growth. The rich oil in walnuts can lubricate the intestinal tract, promote bowel movements and relieve constipation. From the perspective of traditional Chinese medicine, walnuts are sweet and warm in nature and enter the kidney meridian, which is good for relieving diseases caused by kidney deficiency, such as weakness of the waist and knees and tinnitus.