Kidney stone patients in daily life should pay special attention to diet, some foods can aggravate the kidney stone condition, the following is a list of kidney stone patients should pay special attention to the food. Jin Yan, Jinan City Hospital of Traditional Chinese Medicine, Kidney Disease Specialist
Control the intake of calcium
The stones are formed by calcium or products containing calcium. If your last stone was mainly composed of calcium, you have to pay attention to the intake of calcium. If you are taking nutritional supplement crystals, the first thing you need to do is to consult your physician to see if it is necessary. The next step is to check your daily intake of foods high in calcium, including milk, cheese, cream and other dairy products. Milk and antacids may produce kidney stones.
Do not eat foods rich in oxalates
About 60% of stones are calcium oxalate stones. Therefore, limit your intake of oxalate-rich foods, including beans, beets, celery, chocolate, grapes, peppers, parsley, spinach, strawberries and vegetables from the kale family. Also avoid alcohol, caffeine, tea, chocolate, dried figs, lamb, drupes, green peppers, black tea, poppy seeds, etc.
Watch your protein intake
There is a direct correlation between kidney stones and the amount of protein intake. Protein tends to cause uric acid, calcium and phosphorus to appear in the urine, leading to the formation of stones. If you have had calcium stones, you should pay special attention to excessive protein intake, especially if you have a history of excessive uric acid or cysteine stones. Limit yourself to 180 grams of high-protein foods per day, which includes meat, cheese, chicken and fish.
Eat less salt
If you have calcium stones, you should reduce your salt intake. You should reduce your daily salt intake to 2-3 grams.
Avoid L-cystaminic acid
If you have a history of kidney stones or are currently suffering from kidney stones. Avoid L-cystaminic acid in the blood. The buildup of this amino acid can crystallize in the kidney, creating large stones that clog the inside of the kidney.
Limit the amount of vitamin c
If you are prone to forming calcium oxalate stones, you should limit the amount of vitamin c you take. More than 3-4 grams a day may increase the production of oxalic acid, thus increasing the chance of stones. Do not consume high potency vitamin c supplements.
Do not take too much vitamin D
Excess vitamin D may lead to calcium buildup in various parts of the body. It is best to limit your daily intake of vitamin D to no more than the RDA limit of 400 IU.
Check your stomach medication
Some common acid preparations contain high levels of calcium. If you have calcium stones and you are also taking an acidulant, check the ingredients of the medication to see if it is high in calcium. If it contains high calcium, you should switch to another medicine.
In addition, drinking too little water is a major trigger for kidney stones. Especially in the hot season, you should drink more water after exercise and sweating to avoid excessive concentration of urine and prevent crystal deposits in urine. Although fruit juices, soups and milk can be used as auxiliary drinks, water is still the best choice to hydrate the body.
Patients with kidney stones should not drink milk before going to bed. This is due to the fact that milk contains more calcium, and most kidney stones contain calcium salts. The most dangerous factor for stone formation is the sudden increase of calcium concentration in the urine for a short period of time. Two to three hours after drinking milk is the peak of calcium elimination through the kidneys, so when you are sleeping, the urine is concentrated and more calcium passes through the kidneys, adding to the formation of stones.
Foods that may promote stone formation such as: spinach, chocolate, peanuts, cocoa, tomato juice, apple juice, etc.
Foods that may inhibit stone production such as: lemon juice, orange juice, wine.
The main ingredient of protein concentrate, melamine, can cause stones, but some experimental results show that protein concentrate is more likely to cause stones because it is mixed with other ingredients than melamine.
Controversial foods such as beer (diuretic effect, but may accelerate stone production), soda (weak acid, contains phosphate group), grapefruit juice (contains potassium citrate, can inhibit stone production), coffee.