1. What is Hydroxyapatite Toothpaste? Hydroxyapatite is a naturally occurring mineral that is found in the human body. It is the main component of tooth enamel and bone. Hydroxyapatite toothpaste is a toothpaste that contains hydroxyapatite as one of its main ingredients. Hydroxyapatite toothpaste can be used to help prevent cavities, reduce tooth sensitivity, and promote gum health. It is...