1 Holick, M (2007) Vitamin D deficiency. NEJM 357, 266–281.
2 McGrath, JJ, Saha, S, Burne, TH, et al. (2010) A systematic review of the association between common single nucleotide polymorphisms and 25-hydroxyvitamin D concentrations. J Steroid Biochem Mol Biol .
3 Pearce, SHS & Cheetham, TD (2010) Diagnosis and management of vitamin D deficiency. Br Med J 340, 142–147.
4 Bischoff-Ferrari, HA, Dawson-Hughes, B, Staehelin, HB, et al. (2009) Fall prevention with supplemental and active forms of vitamin D: a meta-analysis of randomised controlled trials. Br Med J 339, b3692.
5 Jenab, M, Bueno-de-Mesquita, HB, Ferrari, P, et al. (2010) Association between pre-diagnostic circulating vitamin D concentration and risk of colorectal cancer in European populations: a nested case–control study. Br Med J 340, b5500.
6 Pittas, AG, Chung, M, Trikalinos, T, et al. (2010) Systematic review: vitamin D and cardiometabolic outcomes. Ann Intern Med 15, 307–314.
7 Boucher, BJ (2006) Type 2 diabetes in rural and urban population: diverse prevalence and associated risk factors in Bangladesh. Diabet Med 23, 336–340.
8 Javaid, MK, Crozier, SR, Harvey, NC, et al. (2006) Maternal vitamin D status during pregnancy and childhood bone mass at age 9 years: a longitudinal study. Lancet 367, 36–43.
9 Gregory, J, Lowe, S, Bates, CJ, et al. (2000) The National Diet and Nutrition Survey (NDNS) of People Aged 4–18 Years, vol. 1. London: HMSO.
10 Ruston, D, Hoare, J, Henderson, L, et al. (2004) Nutritional status (anthropometry and blood analytes), blood pressure and physical activity. In The National Diet and Nutrition Survey: Adults Aged 19–64 Years, vol. 4. London: The Stationery Office.
11 Finch, S, Doyle, W, Lowe, C, et al. (1998) National Diet and Nutrition Survey: People Aged 65 Years and Over. Report of the Diet and Nutrition survey, vol. 1. London: The Stationery Office.
12 Hyppönen, E & Power, C (2007) Hypovitaminosis D in British adults at age 45 y: nationwide cohort study of dietary and lifestyle predictors. Am J Clin Nutr 85, 860–868.
13 Mavroeidi, A, O' Neill, F, Lee, P, et al. (2010) Seasonal 25-hydroxy vitamin D changes in British postmenopausal women at 57°N and 51°N: a longitudinal study. J Steroid Biochem Mol Biol .
14 Lanham-New, S, Darling, A & Berry, J (2010) Vitamin D, food intake, nutrition and exposure to sunlight in southern England (D-FINES). In: Final Study Report. London: Food Standards Agency. Proc Nutr Soc .
15 Datta, S, Alfaham, M, Davies, DP, et al. (2002) Vitamin D deficiency in pregnant women from a non-European ethnic minority population – an interventional study. BJOG 109, 905–908.
16 Hyppönen, E & Boucher, BJ (2010) Avoidance of vitamin D deficiency in pregnancy in the United Kingdom: the case for a unified approach in National policy. Br J Nutr 104, 309–314.
17 Francis, RM (2008) What do we currently know about nutrition and bone health in relation to United Kingdom public health policy with particular reference to calcium and vitamin D? Br J Nutr 99, 155–159.
18 Lanham-New, SA, Buttriss, JL, Miles, , et al. (2010) Workshop Report: rank forum on vitamin D. Br J Nutr .
19 Institute of Medicine Food and Nutrition Board (1997) Dietary Reference Intakes: Calcium, Phosphorus, Magnesium, Vitamin D and Fluoride. Washington, DC: National Academy Press.
20 McCance and Widdowson (2009) Composition of Foods, 6th ed. Cambridge: RSC.
21 Park, EA (1940) The therapy of rickets. J Am Med Assoc 115, 370–379.
22 Trang, HM, Cole, DEC, Rubin, LA, et al. (1998) Evidence that vitamin D3 increases serum 25-hydroxyvitamin D more efficiently than does vitamin D2. Am J Clin Nutr 68, 854–858.
23 Heaney, RP, Davies, KM, Chen, TC, et al. (2003) Human serum 25-hydroxycholecalciferol response to extended oral dosing with cholecalciferol. Am J Clin Nutr 77, 204–210.
24 Glendenning, P, Chew, GT, Seymour, HM, et al. (2009) Serum 25-hydroxyvitamin D levels in vitamin D-insufficient hip fracture patients after supplementation with ergocalciferol and cholecalciferol. Bone 4, 870–875.
25 Holick, MF, Biancuzzo, RM, Chen, TC, et al. (2008) Vitamin D2 is as effective as vitamin D3 in maintaining circulating concentrations of 25-hydroxyvitamin D. J Clin Endocrinol Metab 93, 677–681.
26 Biancuzzo, RM, Young, A, Bibuld, D, et al. (2010) Fortification of orange juice with vitamin D2 or vitamin D3 is as effective as an oral supplement in maintaining vitamin D status in adults. Am J Clin Nutr 91, 1621–1626.
27 Lanham-New, SA, Veith, R & Heaney, RP (2010) Vitamin D2 vs. vitamin D3 comparisons: fundamental issues not addressed (letter). Am J Clin Nutr .
28 Ashwell, M, Stone, EM, Stolte, H, et al. (2010) UK Food Standards Agency Workshop Report: an investigation of the relative contributions of diet and sunlight to vitamin D status. Br J Nutr .
29 Webb, AR & Engelsen, O (2008) Ultraviolet exposure scenarios: risks of erythema from recommendations on cutaneous vitamin D synthesis. Adv Exp Med Biol 624, 72–85.
30 Department of Health (1991) Dietary Reference Values for Food Energy and Nutrients for the United Kingdom no. 41. London: HMSO.
31 Department of Health (1998) Nutrition and Bone Health: with Particular Reference to Calcium and Vitamin D no. 49. London: The Stationery Office.