If Vitamin D is very low and urine calcium high 750 so pth what does this mean?

If vitamin D levels are very low and urine calcium levels are high, it is possible that the person has secondary hyperparathyroidism. Secondary hyperparathyroidism occurs when the parathyroid glands become overactive in response to low calcium levels in the blood.

Vitamin D is essential for the absorption of calcium from the intestines. When vitamin D levels are low, the body is unable to absorb enough calcium from food, which can lead to low calcium levels in the blood. In response, the parathyroid glands produce more parathyroid hormone (PTH), which increases the levels of calcium in the blood by mobilizing calcium from bone and increasing calcium absorption from the kidneys.

In secondary hyperparathyroidism, the parathyroid glands are functioning properly, but they are being stimulated to produce more PTH in response to the low calcium levels. This can lead to high levels of PTH in the blood, which can cause a number of problems, including:

- Increased bone resorption, which can lead to osteoporosis and fractures

- Kidney stones

- Muscle weakness

- Fatigue

- Nausea

- Vomiting

Treatment for secondary hyperparathyroidism typically involves increasing vitamin D levels and supplementing calcium. This can help to lower PTH levels and improve the symptoms of the condition.