It’s important to note that this applies only to plain seltzer water—flavored or sweetened versions may contain added sugars or acids that can be more harmful to your teeth. If you enjoy ...

Tonic water is sweetened seltzer with quinine, a bitter flavoring extracted from the bark of the Andean fever tree. It’s typically mixed into gin and tonics. Club soda is sparkling water with ...

Seltzer is made with just two ingredients: purified water and carbon dioxide ... Tonic water is actually closer to a soda because it’s sweetened and flavored with minerals and botanicals.