Nanohydroxyapatite (nHA) is a highly biocompatible and bioactive material with a structure similar to natural bone. It is primarily used in bone regeneration, dental grafts, implant coatings, and bioactive composites due to its excellent affinity with hard tissues. It can also be applied in cosmetics, such as skin creams and formulations for tissue repair, where its remineralizing and regenerative properties support skin health. Available in particle sizes from 20 to 100 nm, it can be tailored for both biomedical and cosmetic applications.