If spinach is eaten without blanching, it will not cause stones in the long run.

Although spinach contains a large amount of oxalic acid, if it is not blanched, the oxalic acid will remain. If you eat spinach for a long time, these oxalic acids will enter the human body and combine with free calcium ions in the body to form oxalic acid. Calcium substance. The precipitate of calcium oxalate will not be decomposed in nature, but not all of this precipitate will enter the kidneys. A large part will still become food residue in the intestines and then be excreted from the body.

Even if a part of the calcium oxalate enters the kidneys and cannot be metabolized by the kidneys, it is not enough to form kidney stones because of the small amount. However, it is indeed not suitable to eat too much oxalic acid, especially for patients who already have stones. After eating too much oxalic acid, the calcium ions in the body will be wasted, and there will be less and less calcium ions in the blood of the body.

The human body is inherently scarce in calcium, so it is a very difficult process to supplement calcium. At this time, because eating spinach also consumes a lot of calcium, it will put the human body in a state of hypocalcemia. If calcium is not replenished over time, the bones of the human body will become loose, and some people's teeth will also become loose.

The free calcium ions in the human body play a very important role in the human body. It can not only regulate muscle contractility, but also maintain the balance of electrolytes in the body. If there is an electrolyte imbalance, there may be problems with kidney function. So if you like to eat spinach, you can blanch the spinach in water before eating. It only takes one minute and it is not particularly troublesome.

If you only eat it occasionally, not blanching it once or twice will not have much impact. After all, the oxalic acid in spinach is limited, so it is very difficult to form stones. But it will still have a certain impact on the body's calcium ions, and the harm will be greater.