It should be be noted that even doses 5x to 10x the recommended USRDA can be toxic.
It is far safer to go to a tanning salon for 5 minutes than to go crazy with Vitamin D pills. Your body naturally will produce the sufficient amount of this hormone.
Utility is when you have one telephone, luxury is when you have two, opulence is when you have three -- and paradise is when you have none. -- Doug Larson