There's more to it than just sugar. Plaque is a thin, invisible film of sticky bacteria & other materials that covers all the surfaces of all your teeth. When sugars or starches in your mouth come in contact with plaque, the acids that result can attack teeth for 20 minutes or more after you finish eatinh. Repeated attacks can break down the hard enamel on the surface of teeth, leading to tooth decay. Plaque also produces toxins that attack the gums and bone supporting the teeth. With regualr brushing & flossing as well as Premium Probiotics like Bio-15 or Biogenics MD, can help reduce plaque.