OBJECTIVE: To explore the association between vitamin B(12) (B(12))-containing supplement use, low B(12) concentrations and biochemically defined B(12) deficiency in US adults. DESIGN: A cross-sectional study with adjustment for survey design. Prevalence ratios for two age groups (18-50 and >50 years) were estimated using unconditional logistic models. Outcome measures included prevalence of low serum B(12) concentration (<148 pmol/l) and biochemical B(12) deficiency (serum B(12)< 148 pmol/l with concomitant homocysteine > 10 mumol/l). SETTING: A population survey of health and nutritional measures. SUBJECTS: Subjects were non-institutionalized adults, aged 18 years and older, who participated in Phase 2 of NHANES III (Third National Health and Nutrition Examination Survey). RESULTS: Low B(12) concentrations were less prevalent among persons consuming B(12)-containing supplements (P = 0.001) with an adjusted prevalence ratio of 0.6 (95 % CI 0.3, 1.0). Biochemical B(12) deficiency showed a similar trend (P = 0.0002), with an adjusted prevalence ratio of 0.3 (95 % CI 0.1, 0.8). Prevalence ratios were similar in adults >50 years of age, although the prevalence of low B(12) and biochemical deficiency was proportionally higher. CONCLUSIONS: Consumption of B(12)-containing supplements was associated with at least 50 % lower prevalence of both low serum B(12) and biochemical B12 deficiency in a nationally representative sample of US adults, suggesting increased consumption of B(12) from supplements or from fortified foods may reduce the prevalence of B(12) deficiency. Additionally, the current Recommended Daily Allowance for B(12) of 2.4 microg may be insufficient for those aged >50 years.
OBJECTIVE: To explore the association between vitamin B(12) (B(12))-containing supplement use, low B(12) concentrations and biochemically defined B(12) deficiency in US adults. DESIGN: A cross-sectional study with adjustment for survey design. Prevalence ratios for two age groups (18-50 and >50 years) were estimated using unconditional logistic models. Outcome measures included prevalence of low serum B(12) concentration (<148 pmol/l) and biochemical B(12) deficiency (serum B(12)< 148 pmol/l with concomitant homocysteine > 10 mumol/l). SETTING: A population survey of health and nutritional measures. SUBJECTS: Subjects were non-institutionalized adults, aged 18 years and older, who participated in Phase 2 of NHANES III (Third National Health and Nutrition Examination Survey). RESULTS: Low B(12) concentrations were less prevalent among persons consuming B(12)-containing supplements (P = 0.001) with an adjusted prevalence ratio of 0.6 (95 % CI 0.3, 1.0). Biochemical B(12) deficiency showed a similar trend (P = 0.0002), with an adjusted prevalence ratio of 0.3 (95 % CI 0.1, 0.8). Prevalence ratios were similar in adults >50 years of age, although the prevalence of low B(12) and biochemical deficiency was proportionally higher. CONCLUSIONS: Consumption of B(12)-containing supplements was associated with at least 50 % lower prevalence of both low serum B(12) and biochemical B12 deficiency in a nationally representative sample of US adults, suggesting increased consumption of B(12) from supplements or from fortified foods may reduce the prevalence of B(12) deficiency. Additionally, the current Recommended Daily Allowance for B(12) of 2.4 microg may be insufficient for those aged >50 years.
Authors: D Z van Asselt; J W Pasman; H J van Lier; D M Vingerhoets; P J Poels; Y Kuin; H J Blom; W H Hoefnagels Journal: J Gerontol A Biol Sci Med Sci Date: 2001-12 Impact factor: 6.053
Authors: Katherine L Tucker; Beth Olson; Peter Bakun; Gerard E Dallal; Jacob Selhub; Irwin H Rosenberg Journal: Am J Clin Nutr Date: 2004-05 Impact factor: 7.045
Authors: Matthew J Hepburn; Kamal Dyal; Lloyd A Runser; Russell L Barfield; Lisa M Hepburn; Susan L Fraser Journal: Int J STD AIDS Date: 2004-02 Impact factor: 1.359
Authors: James F Toole; M René Malinow; Lloyd E Chambless; J David Spence; L Creed Pettigrew; Virginia J Howard; Elizabeth G Sides; Chin-Hua Wang; Meir Stampfer Journal: JAMA Date: 2004-02-04 Impact factor: 56.272
Authors: Hiroko H Dodge; Yuriko Katsumata; Hidemi Todoriki; Shoutoku Yasura; D Craig Willcox; Gene L Bowman; Bradley Willcox; Scott Leonard; Aaron Clemons; Barry S Oken; Jeffrey A Kaye; Maret G Traber Journal: J Gerontol A Biol Sci Med Sci Date: 2010-07-19 Impact factor: 6.053
Authors: Alessandra Vincenti; Laura Bertuzzo; Antonio Limitone; Giuseppe D'Antona; Hellas Cena Journal: Nutrients Date: 2021-06-02 Impact factor: 5.717
Authors: Lael Reinstatler; Yan Ping Qi; Rebecca S Williamson; Joshua V Garn; Godfrey P Oakley Journal: Diabetes Care Date: 2011-12-16 Impact factor: 19.112