With the improvement of people's living standards, the incidence of kidney stones is increasing year by year, and the age of onset is very low. More and more people begin to pay attention to kidney stones, so let's look at the manifestations and types of kidney stones.
The manifestations of kidney stones are lumbago, dysuria, uremia and hydronephrosis. Kidney stones can be extremely painful. According to actor sun Honglei, it's more painful than having a baby. Diet is the key reason for the formation of kidney stones and whether they continue to develop. There are four kinds of kidney stones. This article makes a brief introduction to each mechanism and dietary precautions. In the end, readers will find that the diet to prevent kidney stones is very similar.
Calcium stone: this kind of stone accounts for about 80% of the incidence, including calcium oxalate and calcium phosphate stone. The main reason for the formation of stone is to ingest too much sulfur-containing protein (methionine, cysteine) or total protein. These proteins are absorbed in the form of amino acids and eventually metabolized to sulfate. When the strong acid sulfate is discharged, it will cause the loss of basic calcium. After elimination, the calcium concentrate combined with oxalate or phosphate which was also eliminated and concentrated to form stone. We can imagine the effect of calcium loss caused by high sulfur protein on bone. In diet, avoid high protein, and high sulfur protein animal products.
I've heard that spinach and tofu can't be eaten at the same time since I was young. I'm afraid of calcium oxalate stone formation. In fact, calcium oxalate has been formed in the gastrointestinal tract, because it can not be absorbed, in fact, spinach and tofu eat at the same time to reduce the intake of oxalic acid, is a good match. Studies have shown that calcium supplementation between meals increases the incidence of stones, while taking it with food reduces the risk of stones.
In addition, too much salt (sodium) intake will lead to a large amount of sodium excretion through the kidney, and inhibit its reabsorption in the kidney. Because the reabsorption of sodium is related to the reabsorption of calcium, the reabsorption of calcium is also inhibited. On the contrary, high potassium foods help the kidneys retain calcium. Therefore, the diet should be low in sodium and high in potassium. Fruits, vegetables, beans and grains are the main source of potassium, and they are also natural low sodium foods.
Sugar intake also increases the rate of calcium loss from the kidneys. The famous Harvard nurse study found that eating 60 grams more sugar (sucrose) a day increased the risk of kidney stones by 50% compared with just 20 grams. How much sugar does a can of coke contain? 40 grams.
Uric acid stone: uric acid is a metabolite of purine. Therefore, the prevention method is to avoid foods with high purine content, mainly animal products.
Cystine stone: (cysteine) cystine comes from diet and methionine metabolism, and the proportion of these two kinds of high sulfur amino acids is high in automatic products, so animal products should be avoided.
Infective stone: the cause of infective stone is urinary tract infection. The main source of urinary tract infection bacteria is meat related Escherichia coli, especially chicken. Danish scientists extracted bacteria and meat from hundreds of patients with coliform bacteria and identified their DNA. It was found that patients and meat came from the same bacterial clone, that is to say, the bacteria causing urinary tract infection came from meat. A study from Canada in March 2012 showed that up to 85% of urinary tract infections can be caused by direct contact or consumption of chickens. ~60% of pathogenic E. coli are resistant to at least one antibiotic.
Avoiding animal products and low salt and sugar can remove most of the causes of urinary tract infection. At the same time, calcium supplement must pay attention to time. The best way is to eat more natural foods, such as green vegetables and beans.