But the calcitonin is controlled by the levels of calcium inside our blood. So if the levels of calcium in the blood is very high, calcitonin will be released by our thyroid gland into the blood. And what the calciotonal basically do is it will try to decrease the level of calcium in the blood by three methods. The first method is basically it will increase the rate at which the bone absorbs calcium. It will decrease the rate of activity of osteoclasts, which are the cells in the bone that basically resorb the bone and release calcium into our blood. So it will decrease their activity, but it will increase the activity of osteoblasts, which are those cells in the bone that build the matrix of the bone and absorb the calcium from our blood.