{"title":"维生素B-12的测量是否足以评估个体的缺乏？","authors":"Sedat Özdemir, Selda Demirtaş","doi":"10.6133/apjcn.202504_34(2).0010","DOIUrl":null,"url":null,"abstract":"<p><strong>Background and objectives: </strong>Measurement of vitamin B-12 deficiency using different methods may cause diagnostic difficulties. In order to rapidly and safely diagnose vitamin B-12 deficiency, it is important to determine the reference ranges of serum B-12 and its related biomarkers such as homocysteine, holotranscobalamine (holo-TC) and methylmalonic acid (MMA). This study aimed to determine reference interval (RI)s for serum vitamin B-12 and related markers.</p><p><strong>Methods and study design: </strong>Samples were collected from 404 young-to-middle-aged healthy adults aged 18-65 years. Vitamin B-12, homocysteine, holotranscobalamin, folate were analyzed using the Arcitect i2000 device. Plasma MMA was analyzed by LC/MS. RIs were then evaluated accordingly.</p><p><strong>Results: </strong>Vitamin B-12, folate, homocysteine, holotranscobalamin and plasma MMA were 139-619 pg/mL, 3.0-14.7 ng/mL, 5.6-18.4 μmol/L, 10.7-101 pmol/L, and 0.01-0.8 μmol/L, respectively. Age group-specific RIs were also generated.</p><p><strong>Conclusions: </strong>This study revealed that the diagnosis of vitamin B-12 deficiency should not only be based on serum vitamin B-12 levels, but also of folate, homocysteine, holotranscobalamin and MMA levels; all which are related to vitamin B-12 metabolism.</p>","PeriodicalId":8486,"journal":{"name":"Asia Pacific journal of clinical nutrition","volume":"34 2","pages":"232-239"},"PeriodicalIF":1.3000,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11937488/pdf/","citationCount":"0","resultStr":"{\"title\":\"Are vitamin B-12 measurements adequate for evaluating its deficiency in individuals?\",\"authors\":\"Sedat Özdemir, Selda Demirtaş\",\"doi\":\"10.6133/apjcn.202504_34(2).0010\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Background and objectives: </strong>Measurement of vitamin B-12 deficiency using different methods may cause diagnostic difficulties. In order to rapidly and safely diagnose vitamin B-12 deficiency, it is important to determine the reference ranges of serum B-12 and its related biomarkers such as homocysteine, holotranscobalamine (holo-TC) and methylmalonic acid (MMA). This study aimed to determine reference interval (RI)s for serum vitamin B-12 and related markers.</p><p><strong>Methods and study design: </strong>Samples were collected from 404 young-to-middle-aged healthy adults aged 18-65 years. Vitamin B-12, homocysteine, holotranscobalamin, folate were analyzed using the Arcitect i2000 device. Plasma MMA was analyzed by LC/MS. RIs were then evaluated accordingly.</p><p><strong>Results: </strong>Vitamin B-12, folate, homocysteine, holotranscobalamin and plasma MMA were 139-619 pg/mL, 3.0-14.7 ng/mL, 5.6-18.4 μmol/L, 10.7-101 pmol/L, and 0.01-0.8 μmol/L, respectively. Age group-specific RIs were also generated.</p><p><strong>Conclusions: </strong>This study revealed that the diagnosis of vitamin B-12 deficiency should not only be based on serum vitamin B-12 levels, but also of folate, homocysteine, holotranscobalamin and MMA levels; all which are related to vitamin B-12 metabolism.</p>\",\"PeriodicalId\":8486,\"journal\":{\"name\":\"Asia Pacific journal of clinical nutrition\",\"volume\":\"34 2\",\"pages\":\"232-239\"},\"PeriodicalIF\":1.3000,\"publicationDate\":\"2025-04-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11937488/pdf/\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Asia Pacific journal of clinical nutrition\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://doi.org/10.6133/apjcn.202504_34(2).0010\",\"RegionNum\":4,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"NUTRITION & DIETETICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Asia Pacific journal of clinical nutrition","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.6133/apjcn.202504_34(2).0010","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"NUTRITION & DIETETICS","Score":null,"Total":0}
Are vitamin B-12 measurements adequate for evaluating its deficiency in individuals?
Background and objectives: Measurement of vitamin B-12 deficiency using different methods may cause diagnostic difficulties. In order to rapidly and safely diagnose vitamin B-12 deficiency, it is important to determine the reference ranges of serum B-12 and its related biomarkers such as homocysteine, holotranscobalamine (holo-TC) and methylmalonic acid (MMA). This study aimed to determine reference interval (RI)s for serum vitamin B-12 and related markers.
Methods and study design: Samples were collected from 404 young-to-middle-aged healthy adults aged 18-65 years. Vitamin B-12, homocysteine, holotranscobalamin, folate were analyzed using the Arcitect i2000 device. Plasma MMA was analyzed by LC/MS. RIs were then evaluated accordingly.
Results: Vitamin B-12, folate, homocysteine, holotranscobalamin and plasma MMA were 139-619 pg/mL, 3.0-14.7 ng/mL, 5.6-18.4 μmol/L, 10.7-101 pmol/L, and 0.01-0.8 μmol/L, respectively. Age group-specific RIs were also generated.
Conclusions: This study revealed that the diagnosis of vitamin B-12 deficiency should not only be based on serum vitamin B-12 levels, but also of folate, homocysteine, holotranscobalamin and MMA levels; all which are related to vitamin B-12 metabolism.
期刊介绍：
The aims of the Asia Pacific Journal of Clinical Nutrition
(APJCN) are to publish high quality clinical nutrition relevant research findings which can build the capacity of
clinical nutritionists in the region and enhance the practice of human nutrition and related disciplines for health
promotion and disease prevention. APJCN will publish
original research reports, reviews, short communications
and case reports. News, book reviews and other items will
also be included. The acceptance criteria for all papers are
the quality and originality of the research and its significance to our readership. Except where otherwise stated,
manuscripts are peer-reviewed by at least two anonymous
reviewers and the Editor. The Editorial Board reserves the
right to refuse any material for publication and advises
that authors should retain copies of submitted manuscripts
and correspondence as material cannot be returned. Final
acceptance or rejection rests with the Editorial Board
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