Sugar causes tooth decay because it fuels harmful bacteria in the mouth, leading to the production of acids that erode tooth enamel. When sugar is consumed, it interacts with bacteria in dental plaque, particularly Streptococcus mutans and Lactobacillus. These bacteria metabolize sugar, producing acid as a byproduct. The acid then demineralizes the enamel, weakening the protective outer layer of the teeth. Over time, repeated exposure to these acids creates cavities, or holes in the teeth.
Saliva naturally helps neutralize acids and remineralize enamel, but frequent sugar consumption overwhelms this process, increasing the risk of decay. Sticky and sugary foods, such as candy, soda, and processed snacks, are especially harmful because they cling to teeth and provide a continuous food source for bacteria. Additionally, consuming sugary foods and drinks between meals prolongs acid exposure, accelerating enamel breakdown.
Preventing tooth decay involves reducing sugar intake, maintaining good oral hygiene, and visiting a dentist regularly. Brushing with fluoride toothpaste, flossing, and drinking water help remove sugar and plaque, reducing the risk of cavities. By making healthier dietary choices and practicing good oral care, individuals can protect their teeth from the damaging effects of sugar and maintain long-term oral health.