Sugar can harm teeth in several ways. When we consume sugary foods and drinks, the bacteria in our mouth use the sugar as fuel and produce acids that can erode the enamel on our teeth. Over time, this can lead to cavities and tooth decay. Additionally, sugary foods and drinks can be sticky and adhere to teeth, making it harder for saliva to wash away the bacteria and acids. This can lead to prolonged exposure of the teeth to the harmful effects of sugar. Finally, consuming sugary foods and drinks frequently can contribute to the growth of harmful bacteria in the mouth, which can further increase the risk of tooth decay and gum disease. To protect our teeth, it's important to limit our intake of sugary foods and drinks, brush and floss regularly, and visit the dentist for regular checkups and cleanings.