Stannous fluoride is a compound made of tin and fluoride, commonly used in dental care products like toothpaste and mouth rinses. It helps to prevent tooth decay by strengthening tooth enamel and reducing the growth of harmful bacteria in the mouth. In addition to its cavity-fighting properties, stannous fluoride can also help reduce gum inflammation and sensitivity. It works by forming a protective layer on the teeth, making them more resistant to acid attacks from food and drinks. This makes it a valuable ingredient for maintaining oral health.