What is seltzer water, specifically focusing on its composition (is it just water and CO2, or are there other additives?), how it’s different from other sparkling waters like club soda and sparkling mineral water (in terms of ingredients, manufacturing process, and taste), and its general health implications (e.g., does it hydrate as well as regular water, and are there any potential downsides to drinking a lot of it)?
Answer
Seltzer water is simply plain water that has been artificially carbonated. It contains no added minerals, sweeteners, or flavors, distinguishing it from other types of sparkling water. The bubbles in seltzer water are created by injecting carbon dioxide (CO2) gas into the water under pressure.