{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,2]],"date-time":"2026-06-02T23:30:56Z","timestamp":1780443056917,"version":"3.54.1"},"reference-count":36,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2019,12,2]],"date-time":"2019-12-02T00:00:00Z","timestamp":1575244800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Consejo de Ciencia y Tecnolog\u00eda del Estado de Queretaro M\u00e9xico","award":["CONCYTEQ, EXP. No. 42 ACTA 07\/07\/04"],"award-info":[{"award-number":["CONCYTEQ, EXP. No. 42 ACTA 07\/07\/04"]}]},{"DOI":"10.13039\/100005909","name":"UC Mexus","doi-asserted-by":"publisher","award":["CN03107"],"award-info":[{"award-number":["CN03107"]}],"id":[{"id":"10.13039\/100005909","id-type":"DOI","asserted-by":"publisher"}]},{"name":"USDA, ARS Western Human Nutrition Research Center","award":["NA"],"award-info":[{"award-number":["NA"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nutrients"],"abstract":"<jats:p>Background: Gastric function, Helicobacter pylori infection, and vitamin B12 (B12) dietary intake were assessed as predictors of serum B12. Methods: H. pylori antibodies, gastric function, B12 dietary intake, and biochemical\/hematological parameters were measured in 191 adult women from two rural communities in Quer\u00e9taro, Mexico. Results: The overall mean serum B12 concentration was 211 \u00b1 117 pmol\/L. The prevalences of low (\u2264 148 pmol\/L), marginal (148 to 221 pmol\/L), and adequate (&gt; 221 pmol\/L) serum B12 were 28.4%, 31.1%, and 40.5%, respectively. Seventy-one percent of women tested positive for H. pylori antibodies. The prevalence of gastric function categories did not differ by serum B12 categories. The odds ratio for having low serum B12 was 2.7 (p = 0.01) for women with an intake below the estimated average requirement, 3.6 (p = 0.01) for those in the lowest tertile of total B12 intake, and 3.0 (p = 0.02) for those in the lowest tertile of B12 intake from animal source foods. Age and B12 intake were predictors of serum B12 concentrations [serum B12 (pmol\/L) = 90.060 + 5.208 (B12 intake, \u00b5g\/day) + 2.989 (age, years). Conclusions: Low serum B12 concentrations were associated with low B12 dietary intake but not with H. pylori infection or abnormal gastric function in rural Mexican women.<\/jats:p>","DOI":"10.3390\/nu11122922","type":"journal-article","created":{"date-parts":[[2019,12,3]],"date-time":"2019-12-03T04:58:39Z","timestamp":1575349119000},"page":"2922","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Low Serum B12 Concentrations Are Associated with Low B12 Dietary Intake But Not with Helicobacter pylori Infection or Abnormal Gastric Function in Rural Mexican Women"],"prefix":"10.3390","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9959-3621","authenticated-orcid":false,"given":"Miriam A.","family":"Anaya-Loyola","sequence":"first","affiliation":[{"name":"Escuela de Nutrici\u00f3n, Facultad de Ciencias Naturales, Universidad Aut\u00f3noma de Quer\u00e9taro, Quer\u00e9taro, M\u00e9xico, Av de las Ciencias S\/N, Santiago de Quer\u00e9taro, QT 76230, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alex","family":"Brito","sequence":"additional","affiliation":[{"name":"Laboratory of Pharmacokinetics and Metabolomic Analysis. Institute of Translational Medicine and Biotechnology. I.M. Sechenov First Moscow State Medical University, 2-4 Bolshaya Pirogovskaya St., 119991 Moscow, Russia"},{"name":"Luxembourg Institute of Health, Department of Population Health, NutriHealth Group, 1 A-B, rue Thomas Edison, L-1445 Strassen, Luxembourg"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hayd\u00e9","family":"Vergara-Casta\u00f1eda","sequence":"additional","affiliation":[{"name":"Facultad de Medicina, Universidad Aut\u00f3noma de Quer\u00e9taro, Quer\u00e9taro, M\u00e9xico, Clavel 200, Prados de La Capilla, Santiago de Quer\u00e9taro, QT 76176, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carina","family":"Sosa","sequence":"additional","affiliation":[{"name":"Escuela de Nutrici\u00f3n, Facultad de Ciencias Naturales, Universidad Aut\u00f3noma de Quer\u00e9taro, Quer\u00e9taro, M\u00e9xico, Av de las Ciencias S\/N, Santiago de Quer\u00e9taro, QT 76230, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jorge L.","family":"Rosado","sequence":"additional","affiliation":[{"name":"Escuela de Nutrici\u00f3n, Facultad de Ciencias Naturales, Universidad Aut\u00f3noma de Quer\u00e9taro, Quer\u00e9taro, M\u00e9xico, Av de las Ciencias S\/N, Santiago de Quer\u00e9taro, QT 76230, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lindsay H.","family":"Allen","sequence":"additional","affiliation":[{"name":"USDA, ARS Western Human Nutrition Research Center, 430 W. Health Sciences Drive, University of California, Davis, CA 95616, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2019,12,2]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1179","DOI":"10.1093\/jn\/124.8.1179","article-title":"Iron, vitamin B-12 and folate status in Mexico: Associated factors in men and women and during pregnancy and lactation","volume":"124","author":"Black","year":"1994","journal-title":"J. Nutr."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1013","DOI":"10.1093\/ajcn\/62.5.1013","article-title":"Vitamin B12 deficiency and malabsorption are highly prevalent in rural Mexican communities","volume":"62","author":"Allen","year":"1995","journal-title":"Am. J. Clin. 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