Fluoride is beneficial for oral health because:
It slows down mineral loss (demineralization) from tooth enamel
It remineralizes weakened tooth enamel
It reverses any early signs of tooth decay
It prevents harmful oral bacteria growth
When bacteria break down sugar and carbs in your mouth, acid is produced that eats away at the minerals within your tooth enamel. Weakened tooth enamel makes your teeth more vulnerable to harmful bacteria that can later cause cavities.