Walnut sandwich wood, which is what we usually call walnut, is very helpful for health preservation. Its main function is to help tonify the kidney and consolidate the foundation, and it also has a certain effect of enriching blood and promoting blood circulation. For men with kidney deficiency, the use effect is very good, and it can also effectively treat symptoms such as frequent urination, urgency and backache. In daily life, soaking in water with walnut sandwich wood and drinking it three times a day, especially before going to bed, also has a certain effect on improving sleep, which can effectively improve sleep quality. Walnut itself is a kind of food with very high nutritional value. Walnut kernel is also a non-room temperature food, without any toxin, and it tastes a little sweet. Walnut kernel has a very good effect on enriching blood, moistening lung and strengthening spleen and preserving health. People with insomnia can effectively relieve symptoms, promote sleep and moisturize black hair after eating walnut kernel. So in our daily life, many people will eat walnuts. In addition, when we eat walnut kernels, we can also consider choosing walnut sandwich wood, which can not only effectively improve the immune ability of the human body, but also help to tonify the kidney. Therefore, we must not waste walnut sandwich wood in our daily life. Soaking walnut sandwich wood in water can achieve very good health care effect.