Common supplements that secretly harm your kidneys

Getting the right nutrients is crucial for your overall health and well-being. As many individuals do not get the essential nutrients from food, due to their poor diet, they turn to dietary supplements. While supplements can provide essential vitamins, minerals, some may also pose silent harm. With the dietary supplements industry booming, getting them is easier than ever. However, some can pose serious harm to your vital organs, including your kidneys. Here is a list of five common supplements that could secretly put your kidney health at extreme danger.

Vitamin C

While vitamin C is essential for immunity and collagen production, high doses of vitamin C (above 2,000 mg per day) can harm your kidneys. High doses of this vitamin may lead to the formation of oxalate crystals. These crystals may build up in the kidneys, and increase the risk of kidney stones or, in rare cases, more serious kidney damage. This is especially dangerous for people with pre-existing kidney issues.

A 2013 study found that ascorbic acid supplements are linked to kidney stone incidents in men. "High-dose ascorbic acid supplements, one of the most commonly used vitamin preparations, are associated with a dose-dependent 2-fold increased risk of kidney stone formation among men,” the study authors concluded.

Vitamin D

Vitamin D, which is crucial for bone health, is an essential nutrient. However, its excessive intake can cause calcium buildup in the blood (hypercalcemia). Elevated calcium levels can lead to calcification in the kidneys. This could damage tissues and impair function. Combining high-dose supplements with fortified foods or additional multivitamins can increase the risk of excessive consumption. The doctors recognised the risk of the supplement when a 54-year-old man, who was prescribed a high dosage of vitamin D by a naturopath, showed increased levels of creatinine in his blood. This hinted at kidney damage and malfunction.

Creatine

Gym goers and fitness enthusiasts often take creatine supplements to boost muscle building and athletic performance. However, this supplement can strain the kidneys when taken in high doses. This is because it increases creatinine, a waste product the kidneys must filter, and it can mimic or worsen kidney dysfunction. People with pre-existing conditions are more at risk. Though creatine is generally safe for healthy individuals, dehydration or prolonged use without monitoring can lead to kidney stress.

Herbal supplements

Herbal supplements are often favoured by individuals who prefer a rather 'natural' source of supplements. Supplements such as aristolochia, found in some weight-loss or detox products, and licorice root can be toxic to the kidneys. The National Kidney Foundation recommends keeping herbal supplements at bay, especially if you have any underlying kidney diseases.

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Protein supplements

Protein supplementation is a double-edged sword. While it can benefit people, it can also put your body under stress. Protein supplements are a staple for fitness enthusiasts, however, excessive intake can overburden the kidneys. High protein forces the kidneys to excrete excess nitrogen, which can strain those with compromised kidney function.


Before starting any supplement, consult your doctor, especially if you have high blood pressure, diabetes, or a family history of kidney disease. To keep your kidneys healthy, stay hydrated, eat a balanced diet low in sodium and processed foods, and take steps to manage conditions like diabetes and high blood pressure with lifestyle changes.