Americans consumed over 1 billion gallons of sparkling water in 2024, and the category continues to grow at roughly 12 percent per year. Yet a lingering question follows every fizzy sip: is sparkling water healthy, or does the carbonation quietly damage your teeth and leach calcium from your bones? These concerns have circulated for decades, and the actual research paints a more nuanced picture than either the scare headlines or the marketing campaigns suggest. This wellness guide examines what science actually says about carbonated water’s effects on dental health, bone density, digestion, and hydration.
What Happens When Water Gets Carbonated
Sparkling water is made by dissolving carbon dioxide (CO2) under pressure. When CO2 dissolves in water, a small amount converts to carbonic acid, which gives sparkling water its slightly tangy taste and lowers the pH to around 3 to 4, depending on the brand. For reference, still water has a neutral pH of 7, orange juice sits around 3.5, and cola is about 2.5.
That mild acidity is the source of most health concerns about sparkling water. The question is whether a pH of 3 to 4 is acidic enough to cause meaningful harm to tooth enamel or bone tissue with regular consumption. According to the Journal of Oral Rehabilitation, the erosive potential of a beverage depends not only on its pH but also on its buffering capacity, mineral content, and how long it stays in contact with teeth.
Sparkling Water and Your Teeth
This is the concern most people have when asking is sparkling water healthy. Plain sparkling water is significantly less erosive than sugary sodas, fruit juices, and sports drinks. A widely cited study published in the Journal of Oral Rehabilitation found that plain carbonated water had a very low erosive effect on tooth enamel, roughly 100 times less than sugary soft drinks. The researchers concluded that plain sparkling water poses minimal risk to dental health.
However, not all sparkling water is equal. Flavored sparkling waters that contain citric acid (lemon, lime, or grapefruit flavors) have a lower pH and higher erosive potential than plain varieties. A study from the University of Birmingham published in the International Journal of Paediatric Dentistry found that citrus-flavored carbonated waters could erode enamel at levels approaching those of orange juice when tested in laboratory conditions. The American Dental Association considers plain sparkling water a healthy choice for teeth but recommends limiting flavored varieties with added acids.
Practical tips for protecting your teeth include drinking sparkling water in one sitting rather than sipping throughout the day, using a straw to reduce contact with teeth, rinsing with plain still water afterward, and waiting 30 minutes before brushing (brushing immediately after acidic exposure can spread the softened enamel).
Sparkling Water and Bone Health
The idea that carbonation leaches calcium from bones has been repeated so often that many people accept it as fact. The evidence does not support this claim for sparkling water. A large observational study published in the American Journal of Clinical Nutrition examined over 2,500 adults and found no association between carbonated water intake and reduced bone mineral density. The study did find a link between cola consumption and lower bone density in women, but this effect was attributed to the phosphoric acid in cola, not to carbonation itself.
Plain sparkling water does not contain phosphoric acid. The carbonic acid formed during carbonation is weak and rapidly broken down by the body. According to the National Institute of Arthritis and Musculoskeletal and Skin Diseases, the primary dietary factors affecting bone health are calcium intake, vitamin D status, and overall protein consumption, not carbonation. Some mineral sparkling waters (like Gerolsteiner or San Pellegrino) actually contain significant amounts of calcium and magnesium, potentially benefiting bone health.
Hydration: Sparkling Versus Still
Sparkling water hydrates just as effectively as still water. A randomized crossover study published in the American Journal of Clinical Nutrition found no difference in hydration status between participants who drank sparkling water and those who drank still water over a 24-hour period. The carbonation does not interfere with fluid absorption in the intestine.
For people who struggle to drink enough plain water, sparkling water can actually improve hydration by making water consumption more enjoyable. If the carbonation encourages you to drink more water instead of sugary beverages, the net health effect is strongly positive. If you are looking for other healthy hydration options, our article on whether coconut water is healthy explores an alternative with added electrolytes.
Digestive Effects
Sparkling water has some interesting effects on digestion, some beneficial and some potentially bothersome. On the positive side, carbonated water has been shown to improve swallowing in multiple studies. Research published in European Journal of Gastroenterology and Hepatology found that sparkling water improved symptoms of dyspepsia (indigestion) and constipation compared to still water in a group of 21 patients over a 15-day period.
On the other hand, the CO2 in sparkling water can cause bloating, belching, and abdominal discomfort in some people. Those with irritable bowel syndrome (IBS), gastroesophageal reflux disease (GERD), or functional dyspepsia may find that carbonated beverages worsen their symptoms. The gas can also create a feeling of fullness that might reduce food intake, which could be either positive or negative depending on your goals.
What About Sparkling Water Brands and Additives
The health profile of sparkling water depends heavily on what else is in the bottle. Plain varieties like Perrier, San Pellegrino (mineral water), Topo Chico, and unflavored LaCroix or Bubly contain no sugar, calories, or artificial sweeteners. These are virtually identical to still water in terms of health effects, aside from the mild acidity discussed above.
Flavored sparkling waters often add natural flavors, citric acid, or malic acid. While these are generally safe, the added acids lower the pH further and increase erosive potential. Some brands add artificial sweeteners like sucralose or aspartame, which remain controversial despite being approved by the FDA. Read the ingredient list and choose products with minimal additives when possible.
Mineral sparkling waters naturally sourced from springs (like Gerolsteiner) can contain meaningful amounts of calcium (348 mg per liter), magnesium (108 mg per liter), and bicarbonate. These minerals may actually provide health benefits, particularly for people who do not consume dairy.
Frequently Asked Questions
Is it OK to drink sparkling water every day?
Yes. For most people, drinking plain sparkling water daily is perfectly safe. It hydrates as well as still water, does not harm bones, and poses minimal risk to teeth. If you have GERD or IBS and notice that carbonation worsens your symptoms, limiting intake is reasonable. Choosing plain over citrus-flavored varieties further reduces any potential dental concerns.
Does sparkling water count as water intake?
Absolutely. Sparkling water counts toward your daily fluid intake just like still water. The carbonation does not reduce its hydrating capacity. If sparkling water helps you drink more fluids overall, it is a net positive for hydration.
Is sparkling water bad for kidneys?
There is no evidence that sparkling water harms kidney function. The kidneys easily handle the small amount of carbonic acid in carbonated water. In fact, some research suggests that mineral sparkling waters with high bicarbonate content may be mildly beneficial for kidney stone prevention by raising urine pH. However, people with chronic kidney disease should consult their doctor about any dietary changes.
Can sparkling water help with weight loss?
Sparkling water may support weight management in indirect ways. The carbonation can create a feeling of fullness that reduces appetite, and choosing sparkling water over sugary sodas or juices eliminates significant calorie intake. A small study in the European Journal of Gastroenterology and Hepatology found that carbonated water increased satiety. However, sparkling water is not a weight loss tool on its own.
The Bottom Line
So, is sparkling water healthy? The evidence is reassuring. Plain sparkling water does not damage your bones, hydrates exactly as well as still water, and poses only minimal risk to tooth enamel, far less than soda, juice, or sports drinks. The main caveats are that citrus-flavored varieties are more acidic and that carbonation can aggravate GERD and IBS symptoms in susceptible individuals. If you enjoy sparkling water, drink it freely. Choose plain or minimally flavored varieties, avoid brands with added sugars or sweeteners, and if you notice any digestive discomfort, scale back and see whether symptoms improve. For the vast majority of people, sparkling water is a healthy, zero-calorie way to stay hydrated.