Hypervitaminosis D and hard-to-heal wounds: a case report.

Vitamin D is thought to be safe due to its wide therapeutic index and concentrations are rarely raised to toxic levels in the blood. However, excessive vitamin D supplementation can lead to hypervitaminosis D, causing hypercalcaemia and hyperphosphataemia. Due to its lipid solubility, vitamin D can be stored in adipose tissue, leading to persistent hypercalcaemia, even after supplementation has been discontinued. This case reports an 81-year-old female patient who developed hypervitaminosis D after taking excessive vitamin D supplementation for 30 years. The patient presented with complex bilateral leg wounds and tissue calcification. This case highlights the importance of monitoring vitamin D supplementation and the risks associated with hypervitaminosis D, including soft tissue calcification.