The research protocol must give a clear indication of what follow up will be provided to the research participants and for how long. This may include a follow u, especially for adverse events, even after data collection for the research study is completed.
The two most important hormones for maintaining calcium levels in the body are parathyroid hormone (PTH) and 1,25(OH)2D (the active form of vitamin D).The major regulator is PTH, which is part of a negative feedback loop to maintain [Ca ++ ] ECF (see Humoral regulation).he two most important hormones for maintaining calcium levels in the body are parathyroid hormone (PTH) and 1,25(OH)2D (the active form of vitamin D).
One of the minerals that is important in the regulation and processes of many body functions including bone formation, hormone release, muscle contraction, and nerve and brain function is calcium. If levels of calcium in the body are elevated above what is considered normal, this is referred to as hypercalcemia.he regulation of calcium is primarily controlled by vitamin D, calcitonin, and parathyroid hormone (PTH). 1  Calcitonin is produced in specialized cells in thethyroid gland. 2  Vitamin D is obtained through a process that begins with sun exposure to the skin.