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You are here: Home / Dietary Guidance / Dietary Reference Intakes / DRI Reports / Thiamin, Riboflavin, Niacin, Vitamin B6, Folate, Vitamin B12, Pantothenic Acid, Biotin, and Choline 
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Dietary Guidance

DRI book cover
This DRI report includes the eight water-soluble B complex vitamins — thiamin, riboflavin, niacin, vitamin B6, folate, vitamin B12, pantothenic acid, biotin, and choline, involved with energy metabolism and single-carbon unit transfer processes. View or download the entire 591 page document or just selected sections below, or find information for obtaining the book version.
Dietary Reference Intakes for Thiamin, Riboflavin, Niacin, Vitamin B6, Folate, Vitamin B12, Pantothenic Acid, Biotin, and Choline (1998)
National Academy of Sciences. Institute of Medicine. Food and Nutrition Board.

View or download Full Report (PDF|16.5 MB)

View or download by Chapter or Appendix:

  • Front Matter (PDF|458 KB)
  • Table of Contents (PDF|154 KB)
  • Summary (PDF|581 KB)
  • Chapter 1 - Introduction to Dietary Reference Intakes (PDF|368 KB)
  • Chapter 2 - The B Vitamins and Choline: Overview and Methods (PDF|551 KB)
  • Chapter 3 - A Model for the Development of Tolerable Upper Intake Levels (PDF|684 KB)
  • Chapter 4 - Thiamin (PDF|1.1 MB)
  • Chapter 5 - Riboflavin (PDF|1.3 MB)
  • Chapter 6 - Niacin (PDF|1.1 MB)
  • Chapter 7 - Vitamin B6 (PDF|2 MB)
  • Chapter 8 - Folate (PDF|4.4 MB)
  • Chapter 9 - Vitamin B12 (PDF|2 MB)
  • Chapter 10 - Pantothenic Acid (PDF|638 KB)
  • Chapter 11 - Biotin (PDF|621 KB)
  • Chapter 12 - Choline (PDF|1.4 MB)
  • Chapter 13 - Uses of Dietary Reference Intakes (PDF|466 KB)
  • Chapter 14 - A Research Agenda (PDF|239 KB)
  • Appendix A - Origin and Framework of the Development of Dietary Reference Intakes (PDF|137 KB)
  • Appendix B - Acknowledgments (PDF|56 KB)
  • Appendix C - Système International d'Unités (PDF|34 KB)
  • Appendix D - Search Strategies (PDF|67 KB)
  • Appendix E - Methodological Problems Associated with Laboratory Values and Food Composition Data for B Vitamins (PDF|75 KB)
  • Appendix F - Dietary Intake Data from the Boston Nutritional Status Survey, 1981-1984 (PDF|78 KB)
  • Appendix G - Dietary Intake Data from the Continuing Survey of Food Intakes by Individuals (CSFII), 1994-1995 (PDF|273 KB)
  • Appendix H - Dietary Intake Data from the Third National Health and Nutrition Examination Survey (NHANES III), 1988-1994 (PDF|423 KB)
  • Appendix I - Daily Intakes of B Vitamins by Canadian Men and Women, 1990, 1993 (PDF|109 KB)
  • Appendix J - Options for Dealing with Uncertainties in Developing Tolerable Upper Intake Levels (PDF|171 KB)
  • Appendix K - Blood Concentrations of Folate and Vitamin B12 from the Third National Health and Nutrition Examination Survey (NHANES III), 1988-1994 (PDF|122 KB)
  • Appendix L - Methylenetetrahydrofolate Reductase (PDF|135 KB)
  • Appendix M - Evidence from Animal Studies on the Etiology of Neural Tube Defects (PDF|155 KB)
  • Appendix N - Estimation of the Period Covered by Vitamin B12 Stores (PDF|78 KB)
  • Appendix O - Biographical Sketches (PDF|245 KB)
  • Appendix P - Glossary and Abbreviations (PDF|102 KB)
  • Index (PDF|795 KB)
  • Summary Table, Dietary Reference Intakes: Recommended Intakes for Individuals (PDF|59 KB)
  • Read this DRI report on-line at the National Academies Press website.

    Obtain this DRI report in a hardcopy/book version.

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    Last Modified: Apr 2, 2009  
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