Carbonated water has been found to have both positive and negative effects on your health, according to a variety of medical researchers who have studied it over a period of time. These effects can vary based upon who you are and the state of your gastrointestinal system.
According to a study in the Journal of Nutrition, when sparkling water was consumed by women over the course of one month straight, there were significant reductions in their levels of low-density lipoprotein (LDL) and cholesterol (which leads to heart disease). There was also a significant increase in levels of high-density lipoprotein (HDL) and cholesterol (generally taken to reduce heart disease risk). This is interesting because of the high levels of sodium in sparkling water, which should increase blood pressure. Researchers believe this didn't happen due to the fact that sparkling waters tend to be rich in bicarbonate, which balances out the negative effects of sodium within the body.
According to Tutorials.com, there are also negative effects to drinking carbonated water. As carbonated water is more difficult to digest, due to the bubbles, it can lead to dehydration and put strain on the kidneys. Carbonated water is also considered acidic and can cause problems with weak digestive systems, which are prone to ulcers. It can also lead to an absorption of calcium, which can make your bones weak.
According to a Johns Hopkins study, carbonated water can aid digestion. When your stomach is upset or food is not going down well, drinking carbonated water will help you digest it properly, as the acidity of the water will help to break up everything. There is some health-based truth to the old adages about drinking carbonated beverages.