BOKA contains Nano-hydroxyapatite (n-Ha) is a form of calcium that makes up 97% of your tooth enamel and 70% of your dentin. Because it comprises the primary foundation of teeth & bones, it's restorative for your smile. First used by NASA astronauts in space, n-Ha rebuilds teeth without the toxins found in fluoride, making it safe to swallow. Toothpaste - Toothbrush - Healthy Smile - Healthy Teeth - Oral Health LTKBeauty LTKFamily