17. Excess Vitamin C: The Surprising Kidney Stone Contributor

Vitamin C, also known as ascorbic acid, is an essential nutrient that provides numerous health benefits. It helps to boost the immune system, prevent scurvy, and promote healthy skin. However, consuming too much vitamin C can have adverse effects on the body, particularly on the kidneys.
Excess vitamin C can lead to the formation of kidney stones, a painful condition that occurs when mineral and acid salts form clumps in the urinary tract. Vitamin C supplements are known to increase the levels of oxalate, a naturally occurring substance that can contribute to the formation of kidney stones. When the body metabolizes high doses of vitamin C, it produces oxalate, which is excreted through the urine. Over time, the accumulation of oxalate in the urine can lead to the formation of kidney stones.
It’s worth noting that not all people who consume high doses of vitamin C will develop kidney stones. However, those who are prone to developing kidney stones or have a history of the condition are at an increased risk. Additionally, people with certain medical conditions, such as gout or Crohn’s disease, may also be at a higher risk of developing kidney stones due to their elevated levels of oxalate.
While vitamin C is an essential nutrient, it’s important to consume it in moderation. The recommended daily dose of vitamin C is 75-90 mg for women and 90-120 mg for men. It’s best to obtain vitamin C from natural sources, such as fruits and vegetables, rather than from supplements. If you are prone to developing kidney stones, it’s important to talk to your doctor about your vitamin C intake and any potential health risks. (17)