I have had fm and cfs for 9 years now. Been to all kinds of Dr.s, had all kinds of tests, gone thru depression, vertigo and have an off balance feeling all the time. I recently went to a Endocronologist to see what they had to say about my condition. Never been to this kind of Dr. before. Took some blood work and I just found out that I am vitamin D deficient. She said that most people diagnosed with fm and ms are vitamin D deficient. So I thought to pass along this info. Its apparently a big thing now. Especially with all the sun block we are using to keep out the suns rays. Vitamin D lives in your skin and to get it to work we need the sun. So go figure.