Mineral water on an empty stomach is tolerated by many people, but carbonation can trigger bloating, belching, or heartburn in sensitive individuals. While bicarbonate may feel “soothing” for some, it can worsen reflux symptoms in others. Frequent intake of high-sodium mineral water may also increase overall sodium load. A safer strategy is to start with a small portion, monitor symptoms, try it with or after meals if needed, and check sodium/magnesium values on the label.