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Vitamin D: importance in the prevention of cancers, type 1 diabetes, heart disease, and osteoporosis.\nHolick MF.\nAm J Clin Nutr. 2004 Mar;79(3):362-71. Review. Erratum in: Am J Clin Nutr. 2004 May;79(5):890.\nPMID: 14985208

Benefits of Vitamin D Supplementation Joel M. Kauffman, Ph.D. Journal of American Physicians and Surgeons Volume 14 Number 2 - Summer 2009 Clinical trials show that vitamin D supplementation at higher levels than previously recommended is beneficial for many conditions. It decreases the frequency of falls and fractures, helps prevent cardiovascular disease, and reduces symptoms of colds or influenza. Benefits are also seen in diabetes mellitus, multiple sclerosis, Crohn disease, pain, depression, and possibly autism. Sunlight does not cause an overdose of vitamin D production, and toxicity from supplementation is rare. Dose recommendations are increasing, but appear to be lagging the favorable trial results. A number of common drugs deplete vitamin D levels, and others may limit its biosynthesis from sunlight. People with adequate levels from sun exposure will not benefit from supplementation. While dietary intake is helpful, supplementation is better able to raise serum 25-hydroxyvitamin D , the major circulating metabolite, to the level now thought adequate, 30-50 ng/mL. Where there is inadequate daily sun exposure, oral doses of 1,000-2,000 IU/d are now considered routine, with much higher doses (up to 50,000 IU) for rapid repletion now considered safe.

Reducing the Burden of Disease Through Adequate Intake of Vitamin D3. A presentation at University of California, San Diego, April 9, 2008 by William B. Grant, Ph.D

African Americans, 25-hydroxyvitamin D, and osteoporosis: a paradox. Aloia JF. Am J Clin Nutr. 2008 Aug;88(2):545S-550S. Review. PMID: 18689399

"May 19, 2008 (Orlando, Florida) - A new study shows that a proactive vitamin D treatment plan should be considered when caring for all osteoporosis patients, and that such treatment might help decrease the likelihood of developing vitamin D deficiency. Vitamin D deficiency is widespread among patients being treated for osteoporosis, and such deficiency should be treated aggressively, according to the findings presented here at the American Association of Clinical Endocrinologists 17th Annual Meeting and Clinical Congress."