Adding to the list of illnesses in which vitamin D levels have been found to be decreased, this study found moderately lower levels of vitamin D to be present in Parkinson's and Alzheimer's disease patients. As over 90% of our vitamin D comes from exposure to sunshine, it is possible that the vitamin D deficiency occurs because people with these problems simply cannot get outside as much as healthy people do. Nonetheless, I do recommend good overall nutritional support with a good multivitamin powder for people with these illnesses and for general health maintenance. A good multivitamin powder should contain 2,000 units of vitamin D per dose.
"Prevalence of vitamin d insufficiency in patients with Parkinson disease and Alzheimer disease," Evatt ML, Delong MR, et al, Arch Neurol, 2008; 65(10): 1348-52.
Jacob Teitelbaum, M.D. is one of the world's leading integrative medical authorities on fibromyalgia and chronic fatigue. He is the lead author of four research studies on their treatments, and has published numerous health & wellness books, including the bestseller on fibromyalgia From Fatigued to Fantastic! and The Fatigue and Fibromyalgia Solution. Dr. Teitelbaum is one of the most frequently quoted fibromyalgia experts in the world and appears often as a guest on news and talk shows nationwide including Good Morning America, The Dr. Oz Show, Oprah & Friends, CNN, and Fox News Health.