Did you know that bleeding gums indicates gingivitis or gingivitis? Thanks to the addition of fluoride, LISTERINE Tooth and Gum Protection reduces gum problems and helps to protect the teeth against tooth decay or caries. Use this LISTERINE product twice a day after tooth brushing for stronger teeth and fewer gum problems. Directions Rinse full strength for 30 seconds with 20 ml (2/3 fluid ounce or 4 teaspoonfuls) morning and night. Do not swallow.