Guide to Fluoride

Fluoride is used everyday by millions of people worldwide to protect their teeth. Most people use it in their toothpaste or in the water they drink, but it can also be used in other ways.

This section will help you find out more about fluoride; its many uses and the advantages and disadvantages of each.

What is fluoride?
Fluoride is a natural mineral which is found in some water supplies. You cannot taste, see or smell fluoride, but research shows that it reduces tooth decay in children and adults.

How does fluoride work?
Fluoride helps protect against tooth decay in at least two ways. First, fluoride reduces the loss of mineral from the surface of the tooth during an attack by acid produced by the germs which cause tooth decay. Secondly, fluoride helps to repair any damage caused by the acid attack. Fluoride may reduce tooth decay by between 20% - 50% depending on how it is used.

What is tooth decay?
Tooth decay is caused by acid produced by germs (bacteria) from sugar in food or drink. The acid attacks the tooth, which results in the loss of mineral from the tooth surface. This can, over time, lead to the development of a hole or cavity in the tooth.

How can fluoride be used to prevent tooth decay?
Fluoride is the most successful substance in the fight against tooth decay. Fluoride can be used as a public health measure by adding it to:

These offer protection to a large number of people.
Fluoride can also be self-applied at home in: