All four types of carbonated water have a similar nutrient profile, as they all contain zero calories. Mineral water, which comes from underground water reservoirs, does provide important minerals like sodium, calcium, magnesium, and zinc. So, it might have a leg up on the other options. However, it shouldn't be the sole source of these nutrients as there are only small amounts of them. Minerals are an essential part of our diet because we cannot produce them ourselves in the body. We need minerals for numerous functions—for example, calcium is essential for bone health. Mineral water can be a good way to ensure adequate dietary mineral consumption. That said, it's best to eat a varied diet that includes all food groups rather than rely on mineral water to meet certain nutrient requirements.