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However, parathyroid hormone and calcitonin work together to control calcium levels in the blood. The blood calcium level is the main stimulus for the release of these hormones, as the release of these hormones is not controlled by the pituitary.
Taking high doses of dihydrotachysterol, calcitriol, or ergocalciferol by mouth, with or without calcium, may help increase calcium levels in people with this type of thyroid problem. Increasing calcium intake, with or without vitamin D, may reduce the risk of underactive parathyroid glands.