Calcitonin is a hormone that has been used as an injection for many years. A new version is on the market as a nasal spray. It too slows down bone-eating osteoclasts.
Calcitonin injections have no effect on vertebral bone density...it is anticipated when doing the experiment that there would be...but there is not. (Marieb)
Secretion is the process of elaborating, releasing, and oozing chemicals, or a secreted chemical substance, from a cell or gland. In contrast to excretion, the substance may have a certain function,...