Used primarily in toothpaste formulations to help prevent dental caries (cavities). It releases fluoride ions upon contact with saliva, which strengthen tooth enamel by promoting remineralization and reducing demineralization caused by acids from oral bacteria. Additionally, it inhibits the activity of enzymes involved in acid production by oral bacteria. Commonly found in over-the-counter dental care products due to its stability and effectiveness in fluoride delivery. Also used in some mouth rinses and professional dental treatments for cavity prevention.