1). Stabler SP, Allen RH. Vitamin B12 deficiency as a worldwide problem. Annu Rev Nutr. 2004; 24:299–326.
Article
2). Johnson MA. Nutrition and aging–practical advice for healthy eating. J Am Med Womens Assoc. 2004; 59(4):262–269.
3). Andrès E, Loukili NH, Noel E, Kaltenbach G, Abdelgheni MB, Perrin AE, Noblet-Dick M, Maloisel F, Schlienger JL, Blicklé JF. Vitamin B12 (cobalamin) deficiency in elderly patients. CMAJ. 2004; 171(3):251–259.
4). Herbert V. Staging vitamin B-12 (cobalamin) status in vegetari-ans. Am J Clin Nutr. 1994; 59(5 Suppl):1213S–1222S.
Article
5). Kwok T, Cheng G, Woo J, Lai WK, Pang CP. Independent effect of vitamin B12 deficiency on hematological status in older Chinese vegetarian women. Am J Hematol. 2002; 70(3):186–190.
Article
6). Baik HW, Russell RM. Vitamin B12 deficiency in the elderly. Annu Rev Nutr. 1999; 19:357–377.
Article
7). Johnson MA, Hawthorne NA, Brackett WR, Fischer JG, Gunter EW, Allen RH, Stabler SP. Hyperhomocysteinemia and vitamin B-12 deficiency in elderly using Title IIIc nutrition services. Am J Clin Nutr. 2003; 77(1):211–220.
Article
8). Oh R, Brown DL. Vitamin B12 deficiency. Am Fam Physician. 2003; 67(5):979–986.
9). Sakuta H, Suzuki T, Yasuda H, Wakiyama H, Hase K. Plasma vitamin B12, folate and homocysteine levels in gastrectomized men. Clin Nutr. 2005; 24(2):244–249.
10). Allen LH. How common is vitamin B-12 deficiency? Am J Clin Nutr. 2009; 89(2):693S–696S.
Article
11). Lewerin C, Jacobsson S, Lindstedt G, Nilsson-Ehle H. Serum biomarkers for atrophic gastritis and antibodies against Helicobacter pylori in the elderly: implications for vitamin B12, folic acid and iron status and response to oral vitamin therapy. Scand J Gastroenterol. 2008; 43(9):1050–1056.
12). Chui CH, Lau FY, Wong R, Soo OY, Lam CK, Lee PW, Leung HK, So CK, Tsoi WC, Tang N, Lam WK, Cheng G. Vitamin B12 deficiency–need for a new guideline. Nutrition. 2001; 17(11–12):917–920.
Article
13). Wei W, Liu YH, Zhang CE, Wang Q, Wei Z, Mousseau DD, Wang JZ, Tian Q, Liu GP. Folate/vitamin-B12 prevents chronic hyper-homocysteinemia-induced tau hyperphosphorylation and memory deficits in aged rats. J Alzheimers Dis. 2011; 27(3):639–650.
Article
14). Setola E, Monti LD, Galluccio E, Palloshi A, Fragasso G, Paroni R, Magni F, Sandoli EP, Lucotti P, Costa S, Fermo I, Galli-Kien-le M, Origgi A, Margonato A, Piatti P. Insulin resistance and endothelial function are improved after folate and vitamin B12 therapy in patients with metabolic syndrome: relationship between homocysteine levels and hyperinsulinemia. Eur J Endocrinol. 2004; 151(4):483–489.
Article
15). He K, Merchant A, Rimm EB, Rosner BA, Stampfer MJ, Willett WC, Ascherio A. Folate, vitamin B6, and B12 intakes in relation to risk of stroke among men. Stroke. 2004; 35(1):169–174.
16). Ng TP, Feng L, Niti M, Kua EH, Yap KB. Folate, vitamin B12, homocysteine, and depressive symptoms in a population sample of older Chinese adults. J Am Geriatr Soc. 2009; 57(5):871–876.
Article
17). Prodan CI, Cowan LD, Stoner JA, Ross ED. Cumulative incidence of vitamin B12 deficiency in patients with Alzheimer disease. J Neurol Sci. 2009; 284(1–2):144–148.
Article
18). Tangney CC, Aggarwal NT, Li H, Wilson RS, Decarli C, Evans DA, Morris MC. Vitamin B12, cognition, and brain MRI measures: a cross-sectional examination. Neurology. 2011; 77(13):
Article
19). Park S, Johnson MA. What is an adequate dose of oral vitamin B12 in older people with poor vitamin B12 status? Nutr Rev. 2006; 64(8):373–378.
20). Smith AD, Refsum H. Vitamin B-12 and cognition in the elderly. Am J Clin Nutr. 2009; 89(2):707S–711S.
Article
21). Garrod MG, Green R, Allen LH, Mungas DM, Jagust WJ, Haan MN, Miller JW. Fraction of total plasma vitamin B12 bound to transcobalamin correlates with cognitive function in elderly La22) Lim HS, Heo YR. Plasma total homocysteine, folate, and vitamin B12 status in Korean adults. J Nutr Sci Vitaminol (Tokyo). 2002; 48(4):290–297.
23). Kim HJ, Kim MK, Kim JU, Ha HY, Choi BY. Major determinants of serum homocysteine concentrations in a Korean population. J Korean Med Sci. 2010; 25(4):509–516.
Article
24). Kim J, Park MH, Kim E, Han C, Jo SA, Jo I. Plasma homocysteine is associated with the risk of mild cognitive impairment in an elderly Korean population. J Nutr. 2007; 137(9):2093–2097.
Article
25). Kim G, Kim H, Kim KN, Son JI, Kim SY, Tamura T, Chang N. Relationship of cognitive function with B vitamin status, homocysteine, and tissue factor pathway inhibitor in cognitively impaired elderly: a cross-sectional survey. J Alzheimers Dis. 2013; 33(3):853–862.
Article
26). Korean Society for the Study of Obesity. Diagnosis and therapy of obesity: Asia-Pacific area guideline. Seoul: Korean Society for the Study of Obesity;2000.
27). Carmel R. Prevalence of undiagnosed pernicious anemia in the elderly. Arch Intern Med. 1996; 156(10):1097–1100.
Article
28). Kwak CS, Lee MS, Lee HJ, Whang JY, Park SC. Dietary source of vitamin B12 intake and vitamin B12 status in female elderly Koreans aged 85 and older living in rural area. Nutr Res Pract. 2010; 4(3):229–234.
29). Hvas AM, Nexo E. Diagnosis and treatment of vitamin B12 defi-ciency–an update. Haematologica. 2006; 91(11):1506–1512.
30). Stabler SP. Clinical practice. Vitamin B12 deficiency. N Engl J Med. 2013; 368(2):149–160.
31). Miller JW, Garrod MG, Rockwood AL, Kushnir MM, Allen LH, Haan MN, Green R. Measurement of total vitamin B12 and holo-transcobalamin, singly and in combination, in screening for metabolic vitamin B12 deficiency. Clin Chem. 2006; 52(2):278–285.
Article
32). Clarke R, Grimley Evans J, Schneede J, Nexo E, Bates C, Fletcher A, Prentice A, Johnston C, Ueland PM, Refsum H, Sherliker P, Birks J, Whitlock G, Breeze E, Scott JM. Vitamin B12 and folate deficiency in later life. Age Ageing. 2004; 33(1):34–41.
Article
33). Bang SM, Lee JO, Kim YJ, Lee KW, Lim S, Kim JH, Park YJ, Chin HJ, Kim KW, Jang HC, Lee JS. Anemia and activities of daily living in the Korean urban elderly population: results from the Korean Longitudinal Study on Health and Aging (KLoSHA). Ann Hematol. 2013; 92(1):59–65.
Article
34). den Elzen WP, van der Weele GM, Gussekloo J, Westendorp RG, Assendelft WJ. Subnormal vitamin B12 concentrations and anae-mia in older people: a systematic review. BMC Geriatr. 2010; 10:42.
Article
35). Kuo HK, Sorond FA, Chen JH, Hashmi A, Milberg WP, Lipsitz LA. The role of homocysteine in multisystem age-related problems: a systematic review. J Gerontol A Biol Sci Med Sci. 2005; 60(9):1190–1201.
Article
36). Ravaglia G, Forti P, Maioli F, Martelli M, Servadei L, Brunetti N, Porcellini E, Licastro F. Homocysteine and folate as risk factors for dementia and Alzheimer disease. Am J Clin Nutr. 2005; 82(3):636–643.
Article
37). Hooshmand B, Solomon A, Kåreholt I, Rusanen M, Hänninen T, Leiviskä J, Winblad B, Laatikainen T, Soininen H, Kivipelto M. Associations between serum homocysteine, holotranscobal-amin, folate and cognition in the elderly: a longitudinal study. J Intern Med. 2012; 271(2):204–212.
Article
38). Houston DK, Johnson MA, Nozza RJ, Gunter EW, Shea KJ, Cutler GM, Edmonds JT. Age-related hearing loss, vitamin B-12, and folate in elderly women. Am J Clin Nutr. 1999; 69(3):564–571.
Article
39). Meng S, Ciment S, Jan M, Tran T, Pham H, Cueto R, Yang XF, Wang H. Homocysteine induces inflammatory transcriptional signaling in monocytes. Front Biosci. 2013; 18:685–695.
Article
40). Herrmann M, Widmann T, Colaianni G, Colucci S, Zallone A, Herrmann W. Increased osteoclast activity in the presence of increased homocysteine concentrations. Clin Chem. 2005; 51(12):2348–2353.
Article
41). Sakamoto W, Isomura H, Fujie K, Deyama Y, Kato A, Nishihira J, Izumi H. Homocysteine attenuates the expression of osteocalcin but enhances osteopontin in MC3T3-E1 preosteoblastic cells. Biochim Biophys Acta. 2005; 1740(1):12–16.
Article
42). Dhonukshe-Rutten RA, Lips M, de Jong N, Chin A Paw MJ, Hiddink GJ, van Dusseldorp M, De Groot LC, van Staveren WA. Vitamin B-12 status is associated with bone mineral content and bone mineral density in frail elderly women but not in men. J Nutr. 2003; 133(3):801–807.
Article
43). Ouzzif Z, Oumghar K, Sbai K, Mounach A, Derouiche el M, El Maghraoui A. Relation of plasma total homocysteine, folate and vitamin B12 levels to bone mineral density in Moroccan healthy postmenopausal women. Rheumatol Int. 2012; 32(1):123–128.
Article
44). Maggio D, Cherubini A, Lauretani F, Russo RC, Bartali B, Pieran-drei M, Ruggiero C, Macchiarulo MC, Giorgino R, Minisola S, Ferrucci L. 25 (OH)D Serum levels decline with age earlier in women than in men and less efficiently prevent compensatory hyperparathyroidism in older adults. J Gerontol A Biol Sci Med Sci. 2005; 60(11):1414–1419.
45). Huang W, Shah S, Long Q, Crankshaw AK, Tangpricha V. Improvement of pain, sleep, and quality of life in chronic pain patients with vitamin D supplementation. Clin J Pain. 2013; 29(4):341–347.
Article
46). Pérez-López FR, Chedraui P, Fernández-Alonso AM. Vitamin D and aging: beyond calcium and bone metabolism. Maturitas. 2011; 69(1):27–36.
Article
47). Kim YJ, Moon MS, Yang YJ, Kwon O. Relationship between serum 25-hydroxyvitamin D concentration and the risks of metabolic syndrome in premenopausal and postmenopausal women. Korean J Nutr. 2012; 45(1):20–29.
Article
48). Moon Y, Han SH. Vitamin D deficiency and cognitive dysfunction. Dement Neurocognitive Disord. 2012; 11(4):111–117.
Article
49). Kasayama S, Morita S, Otsuki M, Asanuma N, Saito H, Mukai M, Koga M. Independent association between insulinlike growth factor-I and dehydroepiandrosterone sulphate in women in middle adulthood. Clin Endocrinol (Oxf). 2007; 66(6):797–802.
Article