Calcitonin is a hormone that your thyroid gland makes and releases to help regulate calcium levels in your blood by decreasing it. Calcitonin opposes the actions of the parathyroid hormone, which is a hormone that increases your blood calcium levels.

Calcitonin is a 32 amino acid peptide hormone secreted by parafollicular cells (also known as C cells) of the thyroid (or endostyle) in humans and other chordates in the ultimopharyngeal body. It acts to reduce blood calcium (Ca 2+), opposing the effects of parathyroid hormone (PTH).

Calcitonin is a hormone the thyroid produces to help regulate calcium levels in the body. It can slow the loss of bone density and increase bone mass in people with conditions such as osteoporosis. Some people who take calcitonin to treat osteoporosis may experience side effects, such as diarrhea, abdominal pain, and loss of appetite.

Calcitonin (thyrocalcitonin) is a hormone produced by C cells in the thyroid gland. The main action of calcitonin is on the bone. It increases deposition of calcium and phosphate in the bone and lowers levels in the blood, so effectively it inhibits calcium resorption by binding to a specific receptor on the osteoclasts, and inhibits their action.

CALCITONIN (kal si TOE nin) is a hormone. It helps control calcium in the body. It is used to treat Paget's disease, osteoporosis, and hypercalcemia.