Most people still believe that you can get most of your nutrients from the food you consume, but the latest medical research on taking supplements such as Vitamin D have shown the medical benefits of taking certain supplements. It turns out that vitamin D really isn't a true "vitamin" and that term was coined back when scientists didn't really understand the role of these chemicals. Vitamin D is really a type of hormone and often needed in the body in larger amounts than doctors previously thought. I recommend everyone to read this website and see if it may apply to you. Talk to your primary care doctor about taking vitamin D as a supplement and possibly getting your levels measured.