The research area of parathyroid focuses on studying the parathyroid glands, which are four small glands located near the thyroid gland in the neck. These glands are responsible for regulating calcium levels in the body by producing the parathyroid hormone (PTH). Research in this area involves investigating the function of the parathyroid glands, disorders such as hyperparathyroidism and hypoparathyroidism, and potential treatments for these conditions. Additionally, researchers may study the role of PTH in other physiological processes beyond calcium regulation.