What is considered the safest composition of sparkling water for unrestricted daily intake?

Answer

Water and added $ ext{CO}_2$ only

The safety profile of any daily bubbly beverage is largely dependent on its ingredient list. Plain sparkling water, defined strictly as containing only water and added $ ext{CO}_2$, is deemed the safest option available for daily, unrestricted consumption. Once other components like flavorings, salts, or sweeteners are introduced, potential negative impacts—ranging from digestive upset from sugar alcohols to increased enamel erosion from added acids—become possible factors that require monitoring.

What is considered the safest composition of sparkling water for unrestricted daily intake?
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