
Carbonated drinks, also known as fizzy drinks, are a popular beverage choice, especially during hot weather. However, their consumption has been linked to various health concerns, including kidney damage. Studies suggest that drinking two or more carbonated drinks per day, even if they are diet sodas, can increase the risk of chronic kidney disease. This is due to the high levels of sugar and artificial sweeteners found in these beverages, which can lead to weight gain, Type 2 diabetes, and kidney stone formation. As a result, experts recommend limiting carbonated drink intake to maintain kidney health.
| Characteristics | Values |
|---|---|
| Number of carbonated drinks per day | 2 or more |
| Type of carbonated drinks | Both regular and diet |
| Risk | Increased risk of chronic kidney disease |
| Risk factors | Kidney stones, diabetes, hypertension, family history |
| Recommendations | Avoid carbonated beverages, especially with kidney disease or kidney stones |
| Alternative drinks | Water, infused water, herbal teas, sparkling water without added sugar |
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What You'll Learn
- Drinking two or more carbonated drinks per day may increase the risk of chronic kidney disease
- Artificially sweetened carbonated drinks may negatively impact kidney filtration
- Carbonated drinks are associated with the risk of kidney stone production
- Colas are associated with urinary changes that promote kidney stones
- Carbonated drinks may increase the risk of weight gain and Type 2 diabetes

Drinking two or more carbonated drinks per day may increase the risk of chronic kidney disease
Carbonated drinks, also known as fizzy drinks, contain dissolved carbon dioxide in carbonated water. These drinks are often sweetened with sugar or high-fructose corn syrup, which has been linked to an increased risk of obesity, Type 2 diabetes, and renal damage. Even sugar-free options are not risk-free, as artificial sweeteners can alter gut bacteria and negatively affect kidney filtration over time.
The potential negative impact of carbonated drinks on kidney health may be due to the high phosphorus content in these beverages. Laboratory studies have shown that high phosphorus diets can cause nephrocalcinosis in rats and increase plasma phosphorus levels. Additionally, cola beverages, which are acidified with phosphoric acid, have been associated with urinary changes that promote kidney stone formation. However, it is important to note that non-cola carbonated drinks were not found to be associated with chronic kidney disease in the study.
The link between carbonated beverage consumption and kidney health is a growing area of research. With the prevalence of chronic kidney disease affecting millions of adults, it is crucial to identify modifiable risk factors such as diet. While more studies are needed to confirm the association between cola consumption and kidney disease, current recommendations for patients with kidney concerns suggest limiting or avoiding cola beverages.
To maintain kidney health, it is recommended to stay hydrated with water or infused water, and to seek advice from nephrology experts for early detection and management of any kidney issues.
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Artificially sweetened carbonated drinks may negatively impact kidney filtration
Drinking more than one carbonated drink per day may be dangerous for your kidneys. Artificially sweetened carbonated drinks have been linked to kidney damage. While artificially sweetened drinks do not contain sugar, they have been associated with a decline in kidney filtration rates.
A study published in the Clinical Journal of the American Society of Nephrology in 2010 found that women who drank two or more servings of diet Coke per day had a 30% decrease in kidney filtration rates. It is important to note that kidney filtration tests are impacted by other factors such as age, weight, muscle mass, and pregnancy. However, the study also showed that drinking fewer than two glasses of diet Coke each day did not have any negative impact on kidney function.
Another long-term study of over 3,000 women, with a median age of 67 years, found that drinking two or more diet sodas per day was associated with a significant decline in glomerular filtration rate (GFR), an essential measure of kidney function. The rate of decline in GFR was three times higher in the diet soda drinkers compared to non-diet soda drinkers.
These studies suggest that excessive consumption of artificially sweetened carbonated drinks may negatively impact kidney filtration and increase the risk of chronic kidney disease. It is crucial to stay informed about the potential risks associated with diet sodas and adopt healthier hydration habits, such as drinking water, infused water, or herbal teas, to support kidney health.
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Carbonated drinks are associated with the risk of kidney stone production
Carbonated drinks have been linked to an increased risk of kidney stone production and kidney damage. Studies have shown that drinking two or more carbonated beverages per day, even if they are diet sodas, can increase the risk of chronic kidney disease. This is because carbonated drinks contain large amounts of sugar and empty calories, which can lead to weight gain and an increased risk of Type 2 diabetes.
The high concentrations of high-fructose corn syrup (HFCS) in soda can also raise uric acid levels, which is another risk factor for kidney stone formation. Additionally, laboratory studies have shown that high-phosphate diets can cause nephrocalcinosis in rats, and that diets high in phosphate may increase plasma phosphorus levels. Phosphate in colas may be more bioavailable, and the phosphoric acid in colas has been associated with urinary changes that promote kidney stones.
The risk of kidney stone formation is further exacerbated by the presence of artificial sweeteners in diet sodas. These sweeteners can alter gut bacteria and negatively affect kidney filtration rates, even though they do not contain sugar. According to a study published in the Clinical Journal of the American Society of Nephrology in 2010, women who drank two or more servings of diet Coke per day had a 30% decrease in kidney filtration rates. However, it is important to note that kidney filtration tests are impacted by other factors such as age, weight, muscle mass, and pregnancy.
The link between carbonated beverage intake and kidney stone production has been supported by various studies. In one study, the recurrence of kidney stones was higher among men who continued to drink soft drinks containing phosphoric acid compared to those who drank beverages acidified by citric acid. Another study found that drinking two or more colas per day was associated with an increased risk of chronic kidney disease, with similar results for both regular and artificially sweetened colas.
To maintain kidney health, it is crucial to stay informed about the potential risks associated with carbonated drinks and adopt healthier hydration habits. Water remains the best option for supporting kidney health, as it helps flush out toxins and maintain proper renal function. For those seeking variety, infused water, herbal teas, or sparkling water without added sugar are excellent alternatives.
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Colas are associated with urinary changes that promote kidney stones
Consuming two or more carbonated drinks per day, even if they are diet sodas, can increase the risk of chronic kidney disease. These drinks have been associated with an increased risk of kidney stone production, weight gain, and an increased risk of Type 2 diabetes.
Laboratory studies have shown that high-phosphate diets can cause nephrocalcinosis in rats. Diets high in phosphate may increase plasma phosphorus levels, with phosphate in colas perhaps being more bioavailable. In a randomised trial among men with kidney stones, the recurrence of kidney stones was higher among those who continued to drink soft drinks containing phosphoric acid compared with those who drank beverages acidified by citric acid.
Cola consumption can result in physiological changes in urine composition that are conducive to oxalate kidney stone formation. Phosphoric acid is used to acidify cola beverages, and these drinks have been associated with urinary changes known to promote kidney stones. Current recommendations for patients with kidney disease or kidney stones include avoiding cola beverages, but there is limited evidence to support this recommendation.
In a study, women who drank two or more servings of diet Coke per day had a 30% decrease in kidney filtration rates. It is important to note that kidney filtration tests are impacted by other factors such as age, weight, muscle mass, and pregnancy. According to the study, drinking fewer than two glasses of diet Coke each day had no effect on the kidneys.
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Carbonated drinks may increase the risk of weight gain and Type 2 diabetes
Drinking two or more carbonated drinks per day, even if they are diet sodas, can increase the risk of chronic kidney disease. These drinks have been associated with kidney stone production and contain empty calories and large amounts of sugar, leading to weight gain and an increased risk of Type 2 diabetes.
Carbonated drinks, also known as fizzy drinks, are beverages that have dissolved carbon dioxide in carbonated water. They are often sweetened with sugar in the form of high-fructose corn syrup (HFCS). The high concentrations of HFCS in soda can raise uric acid levels, which has been linked to an increased risk of obesity and Type 2 diabetes.
Excessive sugar intake contributes to weight gain and can lead to Type 2 diabetes, both of which are leading causes of chronic kidney disease (CKD). Even sugar-free options are not entirely risk-free. Studies suggest that artificial sweeteners can alter gut bacteria and negatively affect kidney filtration. Over time, these disruptions may strain the kidneys, especially in individuals with pre-existing renal concerns.
According to Dr Puneet Bhuwania, a consultant nephrologist:
> "Regular and diet drinks [...] may raise your risk of chronic renal disease. High soda consumption can lead to weight gain and increase your risk of Type 2 diabetes, as well as renal damage. Reduce your intake of fizzy beverages to avoid negative effects on your nutrition and kidneys."
It is worth noting that the link between carbonated beverage intake and chronic kidney disease may be specific to cola drinks. Some studies have found that drinking two or more colas per day was associated with an increased risk of chronic kidney disease, while non-cola carbonated beverages were not associated with the same risk.
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Frequently asked questions
Yes, drinking two or more carbonated drinks a day, even if they are diet drinks, can increase the risk of chronic kidney disease. Artificially sweetened carbonated drinks have been related to kidney damage.
The high concentrations of HFCS (high-fructose corn syrup) in soda can raise uric acid levels. This means that your kidneys have to work harder to remove the acid from your blood.
Water is the best option for supporting kidney health, as it helps flush out toxins and maintain proper renal function. Infused water with slices of fruit, herbal teas, or sparkling water without added sugar are also good alternatives.











































