Contains both Chlorhexidine Gluconate and Zinc to hel pfight plaque and maintain oral health. Chlorhexidine Gluconate is the most effective chemical anti-plaque agent available. It has residual effects as long as 24 hours following application. Zinc has been shown to enhance the anti-plaque activity of Chlorhexidine. It helps reduce accumulation of plaque and tartar. It inhibits production and release of volatile sulfer compounds.