Vitamin D Toxicity (Hypervitaminosis D) | Causes, Pathophysiology, Symptoms, Diagnosis, Treatment

The video tutorial discusses vitamin D toxicity, also known as hypervitaminosis D, which occurs when there are toxic levels of vitamin D in the body. It covers the sources of vitamin D, both exogenous (dietary and supplements) and endogenous (synthesis in the skin), and highlights the main causes of toxicity, such as excessive supplement intake and certain medical conditions. The pathophysiology involves increased calcium absorption, leading to hypercalcimia. Clinical features include bone pain, kidney stones, and psychiatric symptoms. Diagnosis is often clinical, supported by lab tests and EKG. Treatment involves discontinuing vitamin D sources, managing symptoms, and using medications like calcitonin in severe cases.

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