BreathaLyser Drinking Water Additive for Dogs Freshens breath, reduces tartar, no brushing Safe, alcohol-free, drinking water additive Reduces, not just masks bad breath Reduces tartar with daily use Improved owner compliance: -Simply add two capfuls to one quart of fresh drinking water per day (10mL per litre) No brushing required. Ingredients: Purified water, Glyercine, Hydroxymethyl-cellulose gum, xylitol, polysorbate 20, potassium sorbate, sodium benzoate, barley malt extract, zinc gluconate, proteolytic enzyme (Emilgase), FD&C Blue No. 1 & chlorhedidene digluconate 0.049% w/w as a preservative..