Science

Scientists discover that cranberry juice may help fight tooth decay

Cranberry juice may offer an unexpected benefit beyond its reputation for helping prevent urinary tract infections: protecting teeth from decay.

✦ Extractive summary — built from the sources' own reporting•From 1 source•1 min read•Updated October 29, 2026, 11:12 AM UTC

Researchers at the University of Illinois Chicago discovered that pure, unsweetened cranberry juice slowed the regrowth of dental plaque bacteria and reduced their production of acids that damage tooth enamel.

The secret may lie in naturally occurring compounds called proanthocyanidins, which interfere with harmful bacteria.

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