No, calcitonin does not increase calcium levels. Its primary role is to lower blood calcium levels when they are elevated. Calcitonin achieves this by inhibiting bone resorption, reducing the activity of osteoclasts (cells responsible for breaking down bone tissue), and promoting calcium excretion by the kidneys. By inhibiting bone breakdown and enhancing urinary calcium excretion, calcitonin helps regulate calcium balance and prevent excessive calcium buildup in the bloodstream. Thus, calcitonin works to lower calcium levels rather than increasing them.