What you eat matters when it comes to your risk of forming kidney stones. One of the more common causes of calcium kidney stones is high levels of calcium in the urine.
High urine calcium levels may be due to the way your body handles calcium, but, remember, it is not always due to how much calcium you eat.
Lowering the amount of calcium in your diet rarely stops stones from forming. Studies have shown that limiting dietary calcium can be bad for bone health and may increase kidney stone risk.
Doctors usually do not tell people to limit dietary calcium in order to lower urine calcium. However, the amount of calcium you consume should not be too high.
Instead of lowering dietary calcium intake, your doctor may try to reduce your urine calcium level by reducing your salt intake.
Having too much salt in your diet is a risk factor for calcium stones. This is because too much salt is passing into the urine, keeping calcium from being reabsorbed from the urine and into the blood.
Reducing salt in the diet lowers urine calcium. This will make it less likely for you to form stones.
Because oxalate is a component of the most common type of kidney stone (calcium oxalate), eating foods rich in oxalate can raise your risk of forming these stones.
A diet high in animal protein, such as beef, fish, chicken and pork, can raise the acid levels in the body and in the urine. High acid levels make it easier for calcium oxalate and uric acid stones to form. The breakdown of meat into uric acid also raises the chance of forming a kidney stone.