Hopefully it will be ok to post this video:
The video is by a neurologist who really has no interest in health food or vitamins but found that by getting her patients on high levels of D3 many of them had almost miraculous recoveries from fibro, sleep disorders, migraines, sleep apnea and many more issues. Watch all five parts if you can.
Vitamin D-3 From Sun
Here is a wonderful youtube video by Dr John Cannell on the importance of vitamin D and getting the sun to on your skin "without sunblock". Sunblock has some terrible chemicals which enter your skin easily transdermally to the rest of your body.
He also mentions that wearing sunglasses is blocking the sun from your eyes and is not heathy either.
Anyone who is sick or not feeling well (or wants to stay healthy) should spend time out in the sun with skin exposed on a regular basis.