降钙素一种缩氨酸荷尔蒙，由人体内的甲状腺产生。在不增加钙含量的情况下，可降低血中钙和磷酸盐的含量 A peptide hormone, produced by the thyroid gland in human beings, that lowers plasma calcium and phosphate levels without augmenting calcium accretion.
医生告诉他他的病是由荷尔蒙失衡引起的。 The doctor told him that his disease was caused by unbalanced hormone.