People's memory mainly depends on the kidney tube, and the quality of memory is related to the kidney. When people are young, their kidneys are full, so they have a good memory. What many people remember from the age of three to seven will never be forgotten. If a person says "he is always forgetting things recently", it means that he has kidney problems. Alzheimer's disease is also caused by kidney problems. Many people like sweet water. In fact, the more you drink this water, the worse it is for your kidneys. Because the spleen and stomach govern the kidney, and the taste that the spleen and stomach like is sweet and light. After drinking a lot of water, many people always go to the toilet. They think it's to remove toxins from the body. It's actually wrong. Doing so actually increases the burden on the body and hurts the kidneys. So I always advise people to drink hot water. They don't drink water when they are not thirsty, but drink water slowly when they are thirsty. In addition, it is best to add a little bitterness to the water, such as tea. If you want to keep a good memory, you should eat less sweets and drink less sweet drinks. More bitter things are good for memory. Monks don't drink or eat meat, but often drink tea. Many famous teas come from there. We call it "Buddha tea". I can't sleep after drinking tea. After drinking tea, my memory is very active and I can remember things long ago. In addition, some animal bone marrow can be added to the diet. Someone said, "Is it okay to eat the brains of animals directly?" This won't work, because some brains are too cold. Pig brain is the coolest, so some people will have some problems after eating pig brain. The brains that can eat are the brains of chickens and rabbits. Some people don't like eating brains, but they can also make bone marrow soup and bone marrow tail, but the best is the cavity bone, which is where the spinal cord stays. If you want the elderly to live a few more years, make them some such food to help them retain kidney essence. If the elderly don't like meat or bone marrow, they can eat nuts, and the best ones are walnuts, pine nuts, hazelnuts and pistachios. Pay attention to how to eat, such as walnuts. Be sure to eat it cooked, not raw, because it can't be absorbed by raw food. Roasted walnuts are the best, and cooked walnuts can also be eaten. Add some salt when cooking, not too salty, and be careful not to add sugar, because sweets are bad for the brain. In addition, boiled walnuts should be peeled, because the function of skin is just the opposite of kernel. Eating like this is good for the brain and the hair will turn black. The best way is to bake it in a microwave oven, because the oil will come out after baking, and the skin and kernel inside are separated. In addition, it is best to buy walnuts with skins, because for one thing, I don't know how long they have been open, and for another, they taste bad. Just like rice, if it is put in a shell, it can be kept for five years, and if it is peeled off, it can be kept for one year at most. The shell can protect us, just as our head protects us. In short, if you want to eat delicious food and be good for your health, you can't be afraid of trouble.