Since the COVID-19 pandemic began, some communities in the U.S. have faced shortages of sodium fluoride, a mineral added to water to help prevent cavities. This shortage has led to the temporary cessation of water fluoridation in several areas. Fluoride helps make tooth enamel more resistant to acids produced by bacteria, which can cause tooth decay. Research has shown that stopping water fluoridation can lead to an increase in cavities, especially in children aged 5 to 18. If your water lacks fluoride, it's important to take extra care of your teeth. Brush three times a day with fluoride toothpaste, and visit your dentist regularly. You can also check if your municipal water is fluoridated by visiting the CDC's website or contacting your local water utility. If needed, ask your pediatrician or dentist about fluoride supplements.