Seltzer Water and Weight Gain: What the Evidence Shows

Does seltzer water cause weight gain?

Plain seltzer water, which contains only carbonated water and no caloric ingredients, does not cause weight gain. Weight gain from caloric beverages occurs when you consistently consume more calories than your body needs over time. Because plain sparkling water has zero calories, it cannot contribute to a positive energy balance on its own. However, what you add to seltzer and how your overall eating patterns change when you use it can indirectly influence weight.

How plain seltzer compares nutritionally to caloric drinks

Carbonated water provides hydration similar to still water, with no sugar, protein, fat, or carbohydrates. This profile matters for weight management because fluids that add calories without increasing satiety can promote overconsumption. In contrast, plain seltzer can be a low-risk alternative to sugary soft drinks, juices, and specialty coffees, especially for people trying to reduce calorie intake.

Key nutrition markers per typical plain seltzer