Tooth enamel is the hardest substance in the body. Without enamel, it would be very painful to bite into food and chew.

Keeping enamel strong is essential for good oral health. To maximise your enamel's strength, keep acidic food and drinks to a minimum, practice good oral hygiene and have a diet rich in calcium, potassium and vitamin D (it helps calcium absorption). Calcium and potassium can't be directly absorbed by enamel, however, they do get converted by the body and released into the saliva.