Document Detail


Plasma vitamin B-12 concentrations in an elderly latino population are predicted by serum gastrin concentrations and crystalline vitamin B-12 intake.
MedLine Citation:
PMID:  12949363     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The prevalence of vitamin B-12 deficiency increases with age, probably resulting from malabsorption of food-bound B-12 secondary to gastric atrophy. On the basis of this assumption, the Institute of Medicine (IOM) recommends those aged >50 y consume crystalline vitamin B-12. There is limited information on the prevalence of gastric atrophy in the elderly and whether the IOM recommendation would be effective. The objective of this study was to assess predictors of vitamin B-12 status and their interactions in free-living elderly. Individuals (n = 57) with deficient plasma vitamin B-12 (p-B12 < 148 pmol/L) were compared with 68 individuals with marginal p-B12 (148-221 pmol/L) and 52 with normal p-B12 (>221 pmol/L) in a cross-sectional sample (n = 1546) of elderly (>60 y) Latinos in California. Associations were examined among p-B12 and serum gastrin, vitamin B-12 intake from food and crystalline sources, and medications that putatively affect vitamin B-12 absorption. Serum gastrin was elevated, indicating gastric atrophy, in 48% of participants with deficient p-B12, 23% with marginal p-B12 and 21% of normal p-B12 participants, and was a significant predictor of deficient p-B12 and high plasma homocysteine (p-tHcy). Median total vitamin B-12 intake exceeded recommendations and was similar among status groups. Crystalline vitamin B-12 intake in the normal p-B12 group was higher than in the deficient p-B12 group (P < 0.01), and tended to be higher than the marginal group (P = 0.07). When serum gastrin was elevated, p-B12 was predicted by crystalline vitamin B-12, but not by intake of vitamin B-12 from food. Elevated serum gastrin was highly prevalent and predicted vitamin B-12 depletion. Crystalline vitamin B-12 intake predicted p-B12 in individuals with elevated serum gastrin, supporting IOM recommendations to increase consumption of crystalline vitamin B-12.
Authors:
Alison K Campbell; Joshua W Miller; Ralph Green; Mary N Haan; Lindsay H Allen
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  The Journal of nutrition     Volume:  133     ISSN:  0022-3166     ISO Abbreviation:  J. Nutr.     Publication Date:  2003 Sep 
Date Detail:
Created Date:  2003-09-01     Completed Date:  2003-10-28     Revised Date:  2014-09-14    
Medline Journal Info:
Nlm Unique ID:  0404243     Medline TA:  J Nutr     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2770-6     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Aged
Aging / blood*
Crystallization
Dietary Supplements
Female
Folic Acid / blood
Food
Gastrins / blood*
Humans
Male
Middle Aged
Osmolar Concentration
Vitamin B 12 / administration & dosage*,  blood*,  chemistry
Vitamin B 12 Deficiency / blood
Grant Support
ID/Acronym/Agency:
R01 AG012975/AG/NIA NIH HHS; R01 AG12975-01/AG/NIA NIH HHS; R01 DK060753/DK/NIDDK NIH HHS; R03 AG033751/AG/NIA NIH HHS; R03 AG033751-01A2/AG/NIA NIH HHS
Chemical
Reg. No./Substance:
0/Gastrins; 935E97BOY8/Folic Acid; P6YC3EG204/Vitamin B 12

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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