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  1. Vitamin B12 deficiency in over 16s - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK603366
    ... interpret serum MMA test results when deciding if vitamin B12 deficiency is likely. 1.3.11. Use laboratory reference ranges to interpret plasma homocysteine test results when ...
  2. Vitamin B12 
    https://medlineplus.gov/ency/article/002403.htm
    ... that is thought to ensure enough nutrition. Dietary reference intakes for vitamin B12: Infants (AI) 0 to 6 months: 0.4 ...
  3. 714-X (PDQ®) - PDQ Cancer Information Summaries - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK65984
    ... i.e., cow) cartilage (and other angiogenesis inhibitors ), vitamin B 12 supplements, and vitamin E supplements be avoided during 714-X treatment.[ 1 , 2 ] References 714X Technical Data. Rock Forest, Canada: CERBE Distribution, ...
  4. Primary Trimethylaminuria - GeneReviews® - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK1103
    ... Funded by the National Institutes of Health. Dietary reference intakes for thiamin, riboflavin, niacin, vitamin B6, folate, vitamin B12, pantothenic acid, biotin, and choline. Washington (DC): National ...
  5. Vitamin B Test: MedlinePlus Medical Test 
    https://medlineplus.gov/lab-tests/vitamin-b-test
    ... what your test results say about your health. References Cleveland Clinic: Health Library: Diagnostics & Testing [Internet]. Cleveland (OH): Cleveland Clinic; c2023.Vitamin B12 Deficiency; [reviewed 2022 Apr 25; cited 2023 Jan ...
  6. Folic Acid 
    https://medlineplus.gov/folicacid.html
    ... Acid Deficiency (National Institutes of Health) Journal Articles References and abstracts from MEDLINE/PubMed (National Library of Medicine) Article: Beyond Folate: The Emerging Role of Maternal Vitamin B12 in Neural... Article: Facilitators and barriers to the ...
  7. Neural Tube Defects | MedlinePlus 
    https://medlineplus.gov/neuraltubedefects.html
    ... Tube Defects (National Institutes of Health) Journal Articles References and abstracts from MEDLINE/PubMed (National Library of Medicine) Article: Beyond Folate: The Emerging Role of Maternal Vitamin B12 in Neural... Article: Comparing Folic Acid Interventions and ...
  8. Fatigue (PDQ®) - PDQ Cancer Information Summaries - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK66049
    ... a given patient include tests for the following: Vitamin B 12 or folate ... National Comprehensive Cancer Network: NCCN Clinical Practice Guidelines ...
  9. Vegetarian Diet 
    https://medlineplus.gov/vegetariandiet.html
    ... for Medical Education and Research) Also in Spanish Vitamin B12 (American Academy of Family Physicians) ... (National Institutes of Health) Journal Articles References and abstracts from MEDLINE/PubMed (National Library of ...
  10. xmlmplus_topics_2025-07-02.xml 
    https://medlineplus.gov/xml/mplus_topics_2025-07-02.xml
    ... and <a href="https://medlineplus.gov/bvitamins.html">vitamin B12</a>. </p> <p ... >Vegan Diet</see-reference><see-reference >Vegans</see- ...
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