What Is Xylitol, Exactly?

Xylitol is a low-calorie sweetener used in many sugar-free or low-calorie foods. “Sugar alcohols like xylitol are sweet-tasting and low in calories,” says Kelly Johnson-Arbor, MD, a toxicologist at MedStar Health in Washington, DC.

“It is present in trace amounts in whole fruit,” says Jamie Alan, PhD, PharmD, an associate professor of pharmacology and toxicology at Michigan State University in East Lansing. Natural sources of xylitol include plums, strawberries, cauliflower, and pumpkin, Dr. Johnson-Arbor adds.

Xylitol is known for its beneficial effects on dental health. “It prevents growth of cavity-causing bacteria…

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