Hopes were dashed: scientists have debunked the popular myth surrounding carbonated water.

According to a recent analysis by scientists, the consumption of carbonated water may provide modest metabolic benefits, such as improving blood glucose absorption and metabolism. However, these effects are too minor to be considered a standalone solution for weight loss. While the carbonation in sparkling water may temporarily suppress hunger and slightly increase digestion speed, it remains unclear how these effects contribute to effective weight management, and the long-term consequences are still unknown, reports News Medical.

In the analysis published in the journal BMJ Nutrition, Prevention & Health, researchers examined the potential link between carbonated water and glucose metabolism, drawing comparisons to the process of hemodialysis—a medical procedure that filters blood in cases of kidney failure.

During hemodialysis, blood becomes alkaline due to the production of carbon dioxide (CO2), which is converted into bicarbonate (HCO3) in red blood cells. This alkalinization process activates enzymes that enhance the absorption and utilization of glucose. The authors suggest that a similar mechanism occurs when CO2 from carbonated water is absorbed through the stomach lining, potentially aiding glucose absorption in the bloodstream.

However, the metabolic impact of this process is minimal, as the researchers found. Clinical observations during hemodialysis indicated that only about 9.5 grams of glucose were utilized over a four-hour session—too little to expect weight loss. The authors emphasize that a balanced diet and regular physical activity remain the most effective and sustainable approaches to weight management.

Moreover, potential side effects of carbonated water on the gastrointestinal tract, such as bloating, gas, and exacerbation of digestive disorders like irritable bowel syndrome or acid reflux, highlight the need for moderation in its consumption. Professor Sumanta Ray, executive director of the Global Institute for Food, Nutrition, and Health NNEdPro, commented on the analysis, stressing that while it is based on data linking carbonated water with glucose metabolism, the findings are not reliable enough to support any preventive or therapeutic recommendations.

He added that potential benefits should be weighed against risks, especially for carbonated beverages that contain additives like sodium or glucose. It is important to note that although carbonated water has become a popular alternative to low-calorie drinks, its impact on weight control remains theoretical and requires further investigation.

According to a Statista study conducted in 2021, over 25% of adult residents in the U.S. reported drinking carbonated water daily, attributed to its perceived health benefits and versatility as a substitute for sugary sodas. Despite its popularity, experts warn that its use as a weight loss aid is still not supported by convincing scientific evidence.

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