Does sparkling water have any negative health effects?
Sparkling water, also known as carbonated water, generally does not have significant negative health effects for most people when consumed in moderation. However, there are some potential concerns to be aware of:

1. Tooth enamel erosion:
   - Sparkling water is more acidic than regular water due to the carbon dioxide that has been added to create the bubbles. This acidity can potentially contribute to tooth enamel erosion over time. However, plain sparkling water is still less acidic than most sugary sodas and other carbonated beverages, which pose a higher risk for tooth enamel erosion.

2. Digestive issues:
   - Some individuals may experience bloating, gas, or discomfort when consuming carbonated beverages, including sparkling water. This is because the carbonation can cause gas buildup in the stomach, which may lead to discomfort for some people.

3. Bone health:
   - There have been concerns that carbonated beverages, in general, may negatively affect bone health. However, research has shown that it is specifically the phosphoric acid found in some cola drinks that may contribute to decreased bone mineral density, not the carbonation itself. Sparkling water does not typically contain phosphoric acid, so it is not considered a significant risk for bone health.

4. Added ingredients:
   - It's important to note that not all sparkling waters are created equal. Some flavored sparkling waters may contain added sugars, artificial sweeteners, or other additives, which could have negative health effects when consumed in large quantities. Always check the ingredient list and nutritional information on the label to make an informed choice.

In summary, plain sparkling water is generally safe to consume for most people, and it can be a healthier alternative to sugary sodas and other carbonated drinks. However, it is essential to consume it in moderation and pay attention to any added ingredients in flavored varieties.
So the short answer is yes. Tooth enamel erosion, digestive issues, and bone health sound like pretty nasty side effects to me. I'm not sure how can you call them not significant?