Post Date December, 03 2023
How is kidney stone formed?
Renal calculus is the most common disease of the urinary system, with more males than females, most of whom are young.
To put it simply, there are stones in the kidney.
Why do stones grow in the kidney?
Medical explanation: insufficient substances in the urine that inhibit the formation of crystals of certain salts or excessive salts in the urine lead to saturation and precipitation, which will form stones and precipitate in the kidney.
To take a simple example, the kidney is like a cup of sugar water. At the beginning, the sugar is dissolved in the water. As the sugar content gets higher and higher, more sugar will not be dissolved in the cup and then precipitate to the bottom of the cup in the form of crystals.
How serious is the harm of kidney stones to the kidney?
Seeing the above explanation, many people will not agree. They simply think that the "water" is sufficient in the future, and then dissolve the "sugar"!
In fact, the kidney has the function of filtering blood, recycling the beneficial substances (glucose, protein, etc.), and then concentrating the metabolic waste and harmful substances (urea, uric acid, etc.) to generate urine, which is temporarily stored in the bladder, and then discharged from the urine tube.
If the urine is too little or too concentrated, some substances with low solubility may precipitate or even crystallize in the renal pelvis and bladder where urine is temporarily stored. These crystals gradually grow up over time. They are kidney stones.
If the stone is small, it can be flushed out of the body by urine; If it is a little larger, it will get stuck in the urethra, forming urethral obstruction and causing infection, and infection and obstruction will aggravate the symptoms of stones, thus forming a vicious circle of stones, obstruction and infection, eventually damaging the kidney tissue and damaging the kidney. The severe pain caused by kidney stones can be unbearable!
Why is everyone so scared about spinach and tofu?
Because of the severe pain, many people hold the attitude of "believing in what they have rather than believing in what they have", and stay away from spinach mixed with tofu.
First of all, let's put aside the right and wrong points of view. There are many kinds of kidney stones. According to the composition of stones, they can be divided into uric acid stones, calcium carbonate stones and calcium oxalate stones, and the diet precautions for different types of stones are different.
"Spinach with tofu is easy to get kidney stones" is mainly aimed at calcium oxalate stones, and the reason for listing is "spinach is high in oxalic acid, tofu is a high-calcium food, and it is easy to form stones when eaten together". Is that right or not?
The real research results are astounding!
Many people think that calcium oxalate stones are caused by eating too much oxalate and calcium. In fact, there is no reason for this. We all know that calcium oxalate is difficult to be absorbed by the body. When we ingest oxalate and calcium at the same time, calcium oxalate precipitates will form in our gastrointestinal tract. If it is not absorbed by the body, it will be discharged from the body with the stool.
Therefore, it is the concentration of oxalic acid in our blood that really determines whether we have stones, which is related to individual differences, metabolism, inflammation, etc. Although diet has some effects, it is not very big. This is a good explanation for the same eating habits of a family. Why only you can get kidney stones.
Similarly, there is speculation about kidney stones caused by high calcium diet. The research of the American Society of Clinical Nutrition also gives a clear answer: high-calcium diet will not cause kidney stones, but will also play a preventive role.
"High calcium is bad" is wrong
When it comes to calcium supplement with tofu, tofu is more unjust than Dou E. When it comes to calcium supplement, tofu is far inferior to dairy products, such as milk, yogurt, cheese, etc., which are high calcium foods.
Research evidence confirms that high calcium intake in the diet will reduce the risk of kidney stones. Patients with kidney stones also do not need to deliberately reduce the calcium intake in the diet. Therefore, it is a great misunderstanding on the Internet that calcium oxalate kidney stones should be eaten less high-calcium foods.
If "spinach+tofu" is taboo, then "spinach+milk" and "spinach+shrimp" must be wrong.
"Spinach" lying on the gun
In natural foods, vegetables and fruits contain different levels of oxalic acid, among which spinach has the highest content, which is widely criticized by people. They believe that high oxalic acid is a risk factor leading to kidney stones.
In fact, it is quite different. In addition to potassium and magnesium, spinach is also rich in betaine, which is an ingredient beneficial to reducing the pH value of urine. As long as the spinach is lightly blanched, most of the oxalic acid can be removed, and it can be safely eaten as an ordinary vegetable.
If you give up such good ingredients because of fear of kidney stones, it would be a great waste!
There is a consensus that natural high-calcium foods can prevent stones. However, calcium is controversial. Some studies have found that calcium can induce the occurrence of stones, while others believe that it will not have any effect.
