A small preliminary study investigated how different beverages affect mouth acidity, comparing sugar-sweetened soda, regular sparkling water, calcium-fortified sparkling water, and plain water in 20 adults.

Researchers measured salivary pH levels after consuming each drink, revealing that soda caused the most significant and prolonged drop in oral pH, while unsweetened sparkling water only temporarily lowered acidity before saliva restored normal conditions.

The study found that acidity remained above the threshold for enamel damage with all tested beverages, emphasizing that factors like frequency of consumption and sugar content also influence dental erosion risk.

Lead researcher Wajiha Zulfiqar noted that replacing soda with unsweetened sparkling water could reduce enamel erosion risks when consumed in moderation alongside good oral hygiene.

The findings highlight potential opportunities for the beverage industry to reformulate acidic drinks to minimize their erosive effects, though long-term impacts on oral health require further research.