Cool Mint Listerine Pocketpacks 288 Breath Strps shown in a clinical study to reduce 52% more plaque and 21% more gingivitis than brushing and flossing alone.Is the only nationally branded antimicrobial mouthwash to receive the ADA Seal of Acceptance for fighting plaque and gingivitis.The ADA Council on Scientific Affairs" Acceptance of Listerine Antiseptic is based on its finding that the product is effective in helping to prevent and reduce gingivitis and plaque above the gumline, when used as directed.