As well as hydroxyapatite, the tooth enamel contains magnesium, sodium, fluoride, and carbonate.
Colgate explained: “Enamel protects the inner, more fragile areas of your teeth, known as dentin and pulp.
“It is the first and most important line of defence against tooth decay. If your enamel is damaged, you could develop cavities, temperature sensitivity, and even tooth infection.”
Enamel degrades from plaque bacteria, excess sugars, and acidic substances in drinks or foods.