The invention relates to method and composition to improve the oral health of companion animals targeting the oral health of the animals and directed towards reducing and preventing the buildup of plaque and calculus, leading to periodontal (i.e. gum) disease that contributes to systemic infections that can affect the heart, kidneys, and other tissues. The preparation uses the Lo Han Kuo fruit extract and N-3 fatty acids as bioactive ingredients combined to function as antibacterial and anti-inflammatory agents delivered to the oral cavity of the animals.