Calcium Oxalate Stone: How do You Get Rid of Calcium in the Kidneys?

Sonali Kapoor

, Health A2Z



Are you aware of calcium oxalate stone? Not really, there are so many types of stone but COS is a very common type of stone. There are a lot of people who are dealing with this kidney stone they may start experience- pain while peeing, stomach pain, urge of urine, etc.  In this blog, being a guider I believe to share some information and more awareness about stones. If you want to know more then read this entire blog.


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What is a Calcium Oxalate Stone?



COS ( calcium oxalate stone ) is a very common type of kidney stone. Kidney stones are solid masses which form in the kidney when there are high levels of calcium, oxalate, cystine, or phosphate and too little liquid. There are different types of kidney stones. Generally, the doctor can test your stones to find what type you have. Calcium oxalate stones are caused by too much oxalate in the urine.


What are the Symptoms of Calcium Oxalate Stone?


Kidney stones may not cause symptoms until they start to move through your urinary tract. When stones move, the pain can be intense.


The main symptoms of calcium oxalate crystals in the urine are:


  • Pain in your side and back that can be intense, and may come in waves


  • Pain when you urinate


  • Blood in your urine, which can look red, pink, or brown


  • Cloudy urine


  • Foul-smelling urine


  • An urgent and constant need to urinate


  • Nausea and vomiting


  • Fever and chills if you have an infection



Where Does Oxalate Stone Come From?


Oxalate comes from many of the foods in our diet. The main dietary sources of oxalate are:


  • Spinach and other green, leafy vegetables
  • Rhubarb
  • Wheat bran
  • Almonds
  • Beets
  • Navy beans
  • Chocolate
  • Okra
  • French fries and baked potatoes
  • Nuts and seeds
  • Soy products
  • Tea
  • Strawberries and raspberries


When you eat these foods, your Gastrointestinal tract (GI ) tract breaks them down and absorbs the nutrients. The leftover wastes then travel to your kidneys, which remove them into your urine. The waste from broken-down oxalate is called oxalic acid. It can meld with calcium to form calcium oxalate crystals in the urine.


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How to Reduce the Risk of Calcium Oxalate Stones?


There are some ways to reduce the risk of calcium oxalate stones such as:


Drink enough fluids


The number one thing you can do is to drink enough fluids, like water. Drinking enough fluids will thin out your urine and make it harder for chemicals to build up and form crystals. Your healthcare provider will look at your overall health, diet, and lifestyle and recommend the right amount of fluid you should have each day.


Avoid eating too much protein: Eating too many foods high in protein can cause stones to form.



Limit salt (sodium): A diet high in salt (sodium) causes calcium to build in your urine. Excess calcium in the urine can lead to new stones. It can also cause your bones to weaken.




What Foods to Avoid if you have Calcium Oxalate Stone?



There are some food items which you should avoid if you have calcium oxalate stone:



  •  Nuts and nut products


  • Peanuts which are legumes, not nuts, and are high in oxalate.


  • Rhubarb


  • Spinach


  • Wheat bran



What is the Best Thing to Drink If You Have Calcium Oxalate Stone?


If you have calcium oxalate stones then you should drink plenty of fluids, particularly water. Have only three servings a day of foods with a lot of calcium, such as milk, cheese, yogurt, oysters, and tofu. Eat lemons or oranges, or drink fresh lemonade.




In the above blog, we have given you such awareness and knowledge about Calcium Oxalate Stone: How do You Get Rid of Calcium in the Kidneys? The best way to control your condition is to drink plenty of water and consult a good doctor.


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