Listerine Zero Antiseptic Mouthwash help prevent gingivitis, reduce plaque, and freshen breath and kills up to 99.9 percent of germs in your mouth. Contains three essential oils, Eucalyptol (extracted from eucalyptus), Thymol (from the thyme plant), and Menthol (a minty oil similar to extract of mint leaf) for a mild mint flavour. The three essential oils work together as effective antiseptics. Listerine Zero Antiseptic Mouthwash is made without alcohol for a less intense taste. Directions: Adult and children 12 years and older: Rinse full strength with 20 mL for 30 seconds twice a day. Children 6 to 11 years: Rinse full strength with 10 mL for 30 seconds twice a day. Supervise children under 12 years of age. Do not swallow. This mouthwash is recognized by the Canadian Dental Association (CDA) for its ability to help reduce and prevent the progression of gingivitis when used in a properly applied program of oral hygiene and regular professional care. Oral health benefits validated by CDA: Adding Listerine Zero Antiseptic Mouthwash to a regular oral hygiene routine reduces and prevents gingivitis more than brushing and flossing alone. This mouthwash comes in 250-millilitre, 1-litre, and 1.5-litre bottles.