MedlinePlus (U.S. National Library of Medicine)
Parathyroid Hormone (PTH) Test · 2023
“PTH is made by your parathyroid glands. They are four pea-sized glands in your neck. […] PTH controls the level of calcium in your blood. If your calcium blood levels are too low, your parathyroid glands will release just enough PTH into your blood to return your calcium levels to normal.
Tradução livre: O PTH é produzido pelas quatro glândulas paratireoides no pescoço. Controla o nível de cálcio no sangue — quando o cálcio está baixo, as paratireoides liberam PTH até normalizar.