Black tea, grape juice, salt-water fish eaten with bones (such as sardines), fortified table salt, mineral, spring and ground water (large regional differences), toothpaste.

Fluoride (symbol F) is a trace element. It is found mainly in the bones and teeth.

Fluoride is important for the mineralisation of bones and teeth. It increases general bone stability and promotes bone formation. It is an important component of tooth enamel and thus serves to prevent decay.