Listerine® original provides 24 hours protection against germs that cause plaque and gingivitis:cleans and removes plaque 6x better than brushing & flossing alone.unique formula with 4 essential oils deeply penetrates to kill the bacteria in the plaque biofilm.recommended for daily use.directions:rinse full strength for 30 seconds with 20 ml (2/3 fluid ounce or 4 teaspoonfuls) morning and night. do not swallow.ingredients:eucalyptol.methyl salicylate.thymol.menthol.