Get 24-hour clean, fresh breath with twice-daily use, plus soothing moisture to ease Dry Mouth symptoms. Each rinse eliminates and blocks bad breath for 12 hours, with sulfur-blocking zinc ions released upon activation that takes place in your cup - with the two solutions working together. No more morning breath. No bad breath all day long. Never have bad breath. So how does it work? SmartMouth has two important solutions. The Sulfur Eliminating Solution contains an odor eliminator which eliminates existing bad breath sulfur gases. The Activating Solution contains zinc. When you mix the two solutions together, it releases a huge number of zinc ions. This zinc-ion technology blocks the germs' ability to ingest protein particles. No protein particles, no new sulfur gas production, which means no new bad breath. Rinsing with SmartMouth Mouthwash eliminates bad breath sulfur gases and then prevents them from coming back for at least 12 hours.