Aspartame, a popular artificial sweetener, does not cause dehydration when consumed within typical amounts. Unlike sugary drinks, aspartame does not require additional water for metabolism, and scientific studies show it may reduce thirst as effectively or better than sugar-sweetened beverages. Although concerns remain about the long-term health effects of artificial sweeteners, current evidence supports aspartame as a safe low-calorie sweetener that does not adversely affect hydration. Consumers can rely on aspartame-containing products to reduce sugar intake without compromising fluid balance or hydration.