Vitamin D toxicity is uncommon, but it can happen when someone takes **excessively high doses of vitamin D supplements**, usually over time. The main problem is that too much vitamin D can cause calcium levels in the blood to rise too high, a condition called **hypercalcemia**. ([Mayo Clinic][1])
That does **not** mean everyone taking vitamin D should stop. If you are taking a dose prescribed by your healthcare professional, follow their advice unless they tell you otherwise. OrderVitamins
## 1. Nausea, Vomiting, or Loss of Appetite
One of the more common signs of excessive vitamin D is digestive upset.
Possible
