Stopping Vitamin D

Here's an interesting piece of physiology for ya:

Vitamin D, the 'sunshine-vitamin', can be toxic when ingested in extremely large amounts. You drink a lot of milk, and eat a lot of yogurt though. Does that mean that you shouldn't go out into the sun? If being outside in sunlight increases the amount of vitamin D in your body, couldn't that lead to a toxic build up of this little vitamin inside of you leading to your developing hypervitaminosis D or hypercalcemia, and the organ and bone damage that these cause?

Nope. God thought about that.

Overexposure to sunlight results in the body shutting down production of vitamin D, keeping you safe and healthy.

I swear, the more I study physiology, the more I am in awe that atheist doctors/physiologists/biologists/etc exixt.