Where does plaque come from and can it cause your teeth to turn yellow? Numerous reasons for this unpleasant phenomenon. Plaque is a consequence of irregular brushing, smoking, frequent consumption of coffee, low fiber in food, gastrointestinal pathology and what is very interesting - chewing primarily on one side. Besides the purely aesthetic problem, plaque can lead to tooth decay and its complications: pulpitis, periodontitis, etc. However, the enamel layer is also thinned and destroyed by acids from food and drinks.