Understanding Vitamin D Toxicity: Signs and Risks

3. Kidney Stones

Nephrocalcinosis, otherwise known as kidney stones, are made of tiny calcium and phosphate crystals. Because vitamin D toxicity increases the amount of both minerals in the bloodstream, it can lead to kidney stones and symptoms such as nausea and vomiting, fever, blood in urine, and intense pain around the back, side, or groin.

In addition to the pain and other symptoms, nephrocalcinosis can also damage the kidneys. The stones can grow and damage surrounding tissue as more phosphate and calcium filter through the kidneys. The delicate tissue in the organs doesn't regenerate, so it's very important to catch and treat kidney stones immediately.