Even if you love being in the sun, if you live in the US, you could (and are likely to be) deficient in Vitamin D – it’s a very widespread condition! Here is an article from Dr. Mercola that lists the 7 signs that indicate that you may have a vitamin D deficiency. The article talks about the risks of low levels of Vitamin D, and what you can do to increase your levels.
There’s also a video of Dr. Mercola interviewing Dr. Michael Holick about Vitamin D. Well worth watching!
See the full article on Dr. Mercola’s site.