1. Holick MF. Vitamin D deficiency. N Engl J Med. 2007. 357:266–281.
2. Eyles DW, Smith S, Kinobe R, Hewison M, McGrath JJ. Distribution of the vitamin D receptor and 1 alpha-hydroxylase in human brain. J Chem Neuroanat. 2005. 29:21–30.
3. Choi HS, Oh HJ, Choi H, Choi WH, Kim JG, Kim KM, et al. Vitamin D insufficiency in korea--a greater threat to younger generation: the korea national health and nutrition examination survey (KNHANES) 2008. J Clin Endocrinol Metab. 2011. 96:643–651.
4. Norval M, Wulf HC. Does chronic sunscreen use reduce vitamin D production to insufficient levels? Br J Dermatol. 2009. 161:732–736.
5. Heaney RP, Davies KM, Chen TC, Holick MF, Barger-Lux MJ. Human serum 25-hydroxycholecalciferol response to extended oral dosing with cholecalciferol. Am J Clin Nutr. 2003. 77:204–210.
6. Institute of Medicine. Dietary reference intakes for calcium and vitamin D: report brief. 2010. Washington, DC: National Academy of Sciences.
7. Bischoff-Ferrari HA, Giovannucci E, Willett WC, Dietrich T, Dawson-Hughes B. Estimation of optimal serum concentrations of 25-hydroxyvitamin D for multiple health outcomes. Am J Clin Nutr. 2006. 84:18–28.
8. Nimitphong H, Holick MF. Vitamin D, neurocognitive functioning and immunocompetence. Curr Opin Clin Nutr Metab Care. 2011. 14:7–14.
9. DeLuca HF. Overview of general physiologic features and functions of vitamin D. Am J Clin Nutr. 2004. 80:1689S–1696S.
10. Lai JK, Lucas RM, Clements MS, Harrison SL, Banks E. Assessing vitamin D status: pitfalls for the unwary. Mol Nutr Food Res. 2010. 54:1062–1071.
11. Souberbielle JC, Body JJ, Lappe JM, Plebani M, Shoenfeld Y, Wang TJ, et al. Vitamin D and musculoskeletal health, cardiovascular disease, autoimmunity and cancer: recommendations for clinical practice. Autoimmun Rev. 2010. 9:709–715.
12. Evatt ML, Delong MR, Khazai N, Rosen A, Triche S, Tangpricha V. Prevalence of vitamin D insufficiency in patients with parkinson disease and alzheimer disease. Arch Neurol. 2008. 65:1348–1352.
13. Buell JS, Dawson-Hughes B, Scott TM, Weiner DE, Dallal GE, Qui WQ, et al. 25-hydroxyvitamin D, dementia, and cerebrovascular pathology in elders receiving home services. Neurology. 2010. 74:18–26.
14. Holick MF. Vitamin D: Evolutionary, physiological and health perspectives. Curr Drug Targets. 2011. 12:4–18.
15. Kim YJ, Moon MS, Yang YJ, Kwon O. Relationship between serum 25-hydroxyvitamin D concentration and the risksof metabolic syndrome in premenopausal and postmenopausal women. Korean J Nutr. 2012. 45:20–29.
16. Gouveri E, Papanas N, Hatzitolios AI, Maltezos E. Hypovitaminosis D and peripheral arterial disease: emerging link beyond cardiovascular risk factors. Eur J Intern Med. 2012. 23:674–681.
17. Simon KC, Munger KL, Ascherio A. Vitamin D and multiple sclerosis: epidemiology, immunology, and genetics. Curr Opin Neurol. 2012. 25:246–251.
18. Raftery T, O'Morain C, O'Sullivan M. Vitamin D: New roles and therapeutic potential in inflammatory bowel disease. Curr Drug Metab. 2012. 04. 10. [Epub ahead of print].
19. Black LJ, Seamans KM, Cashman KD, Kiely M. An updated systematic review and meta-analysis of the efficacy of vitamin D food fortification. J Nutr. 2012. 142:1102–1108.
20. Hathcock JN, Shao A, Vieth R, Heaney R. Risk assessment for vitamin D. Am J Clin Nutr. 2007. 85:6–18.
21. Kalueff AV, Tuohimaa P. Neurosteroid hormone vitamin D and its utility in clinical nutrition. Curr Opin Clin Nutr Metab Care. 2007. 10:12–19.
22. Prufer K, Veenstra TD, Jirikowski GF, Kumar R. Distribution of 1,25-dihydroxyvitamin D3 receptor immunoreactivity in the rat brain and spinal cord. J Chem Neuroanat. 1999. 16:135–145.
23. Annweiler C, Schott AM, Berrut G, Chauvire V, Le Gall D, Inzitari M, et al. Vitamin D and ageing: neurological issues. Neuropsychobiology. 2010. 62:139–150.
24. Etgen T, Sander D, Bickel H, Sander K, Forstl H. Vitamin d deficiency, cognitive impairment and dementia: a systematic review and meta-analysis. Dement Geriatr Cogn Disord. 2012. 33:297–305.
25. Brown J, Bianco JI, McGrath JJ, Eyles DW. 1,25-dihydroxyvitamin D3 induces nerve growth factor, promotes neurite outgrowth and inhibits mitosis in embryonic rat hippocampal neurons. Neurosci Lett. 2003. 343:139–143.
26. Garcion E, Wion-Barbot N, Montero-Menei CN, Berger F, Wion D. New clues about vitamin D functions in the nervous system. Trends Endocrinol Metab. 2002. 13:100–105.
27. Riaz S, Malcangio M, Miller M, Tomlinson DR. A vitamin D(3) derivative (CB1093) induces nerve growth factor and prevents neurotrophic deficits in streptozotocin-diabetic rats. Diabetologia. 1999. 42:1308–1313.
28. Gezen-Ak D, Dursun E, Ertan T, Hanagasi H, Gurvit H, Emre M, et al. Association between vitamin D receptor gene polymorphism and alzheimer's disease. Tohoku J Exp Med. 2007. 212:275–282.
29. Masoumi A, Goldenson B, Ghirmai S, Avagyan H, Zaghi J, Abel K, et al. 1alpha,25-dihydroxyvitamin D3 interacts with curcuminoids to stimulate amyloid-beta clearance by macrophages of alzheimer's disease patients. J Alzheimers Dis. 2009. 17:703–717.
30. Taniura H, Ito M, Sanada N, Kuramoto N, Ohno Y, Nakamichi N, et al. Chronic vitamin D3 treatment protects against neurotoxicity by glutamate in association with upregulation of vitamin D receptor mRNA expression in cultured rat cortical neurons. J Neurosci Res. 2006. 83:1179–1189.
31. Lin AM, Chen KB, Chao PL. Antioxidative effect of vitamin D3 on zinc-induced oxidative stress in CNS. Ann N Y Acad Sci. 2005. 1053:319–329.
32. McGrath J, Scragg R, Chant D, Eyles D, Burne T, Obradovic D. No association between serum 25-hydroxyvitamin D3 level and performance on psychometric tests in NHANES III. Neuroepidemiology. 2007. 29:49–54.
33. Oudshoorn C, Mattace-Raso FU, van der Velde N, Colin EM, van der Cammen TJ. Higher serum vitamin D3 levels are associated with better cognitive test performance in patients with alzheimer's disease. Dement Geriatr Cogn Disord. 2008. 25:539–543.
34. Buell JS, Scott TM, Dawson-Hughes B, Dallal GE, Rosenberg IH, Folstein MF, et al. Vitamin D is associated with cognitive function in elders receiving home health services. J Gerontol A Biol Sci Med Sci. 2009. 64:888–895.
35. Llewellyn DJ, Langa KM, Lang IA. Serum 25-hydroxyvitamin D concentration and cognitive impairment. J Geriatr Psychiatry Neurol. 2009. 22:188–195.
36. Lee DM, Tajar A, Ulubaev A, Pendleton N, O'Neill TW, O'Connor DB, et al. Association between 25-hydroxyvitamin D levels and cognitive performance in middle-aged and older european men. J Neurol Neurosurg Psychiatry. 2009. 80:722–729.
37. Annweiler C, Schott AM, Allali G, Bridenbaugh SA, Kressig RW, Allain P, et al. Association of vitamin D deficiency with cognitive impairment in older women: cross-sectional study. Neurology. 2010. 74:27–32.
38. Seamans KM, Hill TR, Scully L, Meunier N, Andrillo-Sanchez M, Polito A, et al. Vitamin D status and measures of cognitive function in healthy older european adults. Eur J Clin Nutr. 2010. 64:1172–1178.
39. Llewellyn DJ, Lang IA, Langa KM, Muniz-Terrera G, Phillips CL, Cherubini A, et al. Vitamin D and risk of cognitive decline in elderly persons. Arch Intern Med. 2010. 170:1135–1141.
40. Jorde R, Waterloo K, Saleh F, Haug E, Svartberg J. Neuropsychological function in relation to serum parathyroid hormone and serum 25-hydroxyvitamin D levels. the tromso study. J Neurol. 2006. 253:464–470.
41. Slinin Y, Paudel ML, Taylor BC, Fink HA, Ishani A, Canales MT, et al. 25-hydroxyvitamin D levels and cognitive performance and decline in elderly men. Neurology. 2010. 74:33–41.
42. Slinin Y, Paudel M, Taylor BC, Ishani A, Rossom R, Yaffe K, et al. Association between serum 25(OH) vitamin D and the risk of cognitive decline in older women. J Gerontol A Biol Sci Med Sci. 2012. 67:1092–1098.
43. Annweiler C, Rolland Y, Schott AM, Blain H, Vellas B, Herrmann FR, et al. Higher vitamin D dietary intake is associated with lower risk of alzheimer's disease: a 7-year follow-up. J Gerontol A Biol Sci Med Sci. 2012. 67:1205–1211.
44. Dickens AP, Lang IA, Langa KM, Kos K, Llewellyn DJ. Vitamin D, cognitive dysfunction and dementia in older adults. CNS Drugs. 2011. 25:629–639.
45. Dhesi JK, Jackson SH, Bearne LM, Moniz C, Hurley MV, Swift CG, et al. Vitamin D supplementation improves neuromuscular function in older people who fall. Age Ageing. 2004. 33:589–595.
46. Przybelski R, Agrawal S, Krueger D, Engelke JA, Walbrun F, Binkley N. Rapid correction of low vitamin D status in nursing home residents. Osteoporos Int. 2008. 19:1621–1628.
47. Annweiler C, Herrmann FR, Fantino B, Brugg B, Beauchet O. Effectiveness of the combination of memantine plus vitamin D on cognition in patients with alzheimer disease: a pre-post pilot study. Cogn Behav Neurol. 2012. 25:121–127.