Ned Tijdschr Geneeskd 146:1100–1101PubMed 8. Van der Meer IM, Boeke Selleck Ku 0059436 AJ, Lips P, Grootjans-Geerts I, Wuister JD, Devillé WL, Wielders JP, Bouter LM, Middelkoop BJ (2008) Fatty fish and supplements are the

greatest modifiable contributors to hydroxyvitamin D concentration in a multi-ethnic population. Clin Endocrinol 68:466–472CrossRef 9. Van der Meer I, Karamali NS, Boeke AJ, Lips P, Middelkoop BJ, Verhoeven I, Wuister JD (2006) High prevalence of vitamin D deficiency in pregnant non-Western women in The Hague, Netherlands. Am J Clin Nutr 84:350–353PubMed 10. Holick MF (1987) Photosynthesis of vitamin D in the skin: effect of environmental and life-style variables. Fed Proc 46:1876–1882PubMed 11. Harris SS, Dawson-Hughes B (1998) Seasonal changes in plasma 25-hydroxyvitamin D concentrations of young American black and white women. Am J Clin Nutr 67:1232–1236PubMed 12. Lips P (2001) Vitamin D deficiency and secondary hyperparathyroidism in the elderly: consequences for bone loss and fractures and therapeutic implications. Endocr Rev 22:477–501CrossRefPubMed 13. Lips P (2006) Vitamin D physiology. Prog Biophys Mol Biol 92:4–8CrossRefPubMed

14. Wicherts IS, van Schoor NM, Boeke AJ, Visser M, Deeg DJ, Smit J, Knol DL, Lips P (2007) Vitamin D status predicts physical performance and its decline in Selleckchem ZVADFMK older persons. J Clin Endocrinol Metab 92:2058–2065CrossRefPubMed 15. Bischoff-Ferrari HA, Dietrich T, Orav EJ, Hu FB, Zhang YQ, Karlson EW, Dawson-Hughes B (2004) Higher 25-hydroxyvitamin D concentrations are associated with better lower-extremity function in both active and inactive persons aged > = 60 y. Am J Clin Nutr 80:752–758PubMed 16. Dawson-Hughes B, Heaney RP, Holick MF, Lips P, Meunier PJ, Vieth R (2005) Estimates of optimal vitamin D status. Osteoporos Int 16:713–716CrossRefPubMed 17. Dhesi JK, Bearne LM, Moniz C,

Hurley MV, Jackson SHD, Swift CG, Allain TJ (2002) Neuromuscular and psychomotor Ureohydrolase function in elderly subjects who fall and the relationship with vitamin D status. J Bone Miner Res 17:891–897CrossRefPubMed 18. Gerdhem P, Ringsberg K, Obrant K, Akesson K (2005) Association between 25-hydroxy vitamin D levels, physical activity, muscle strength and fractures in the prospective population-based OPRA Study of Elderly Women. Osteoporos Int 16:1425–1431CrossRefPubMed 19. Pfeifer M, Begerow B, Minne HW, Schlotthauer T, Pospeschill M, Scholz M, Lazarescu AD, Pollahne W (2001) Vitamin D status, trunk muscle strength, body sway, falls, and fractures among 237 postmenopausal women with osteoporosis. Exp Clin Endocrinol Diab 109:87–92CrossRef 20. Zamboni M, Zoico E, Tosoni P, Zivelonghi A, Bortolani A, Maggi S, Di Francesco V, Bosello O (2002) Relation between vitamin D, physical performance, and disability in elderly persons. J Gerontol Biol Sc Med Sc 57:M7–M11 21.