Parathyroid hormone (PTH) human is primarily used in the treatment of hypoparathyroidism, a condition where the body produces insufficient levels of parathyroid hormone. This hormone is crucial for regulating calcium and phosphorus levels in the blood. By administering PTH, calcium levels can be normalized, reducing symptoms such as muscle cramps, seizures, and tingling sensations. It is also employed in the management of osteoporosis, particularly in postmenopausal women at high risk of fractures. PTH helps in stimulating bone formation, increasing bone density, and reducing the likelihood of bone fractures. Additionally, it is sometimes used in diagnostic tests to evaluate parathyroid function and calcium metabolism disorders.