1. Food and Drug Administration; http://www.fda.gov/ForConsumers/ConsumerUpdates/ ucm118079.htm

2. Medline Plus; http://www.nlm.nih.gov/medlineplus/bvitamins.html

3. Kostowski W., Herman Z. S.: Farmakologia.Podstawy farmakoterapii. Tom I, wyd. PZWL, 2007.

4. Wu Xia-Yu, Lu Lin: Vitamin B6 Deficiency, Genome Instability and Cancer. Asian Pacific J. Cancer Prev. 13 (11), 5333-5338, 2012.

5. Jarosz M. i wsp. : Normy żywienia dla populacji polskiej - nowelizacja, Instytut Żywności i Żywienia, 2012.

6. National Institutes of Health http://ods.od.nih.gov/factsheets/VitaminB6-HealthProfessional/

7. Mackey A. i wsp.: Vitamin B6. W: Shils M, Shike M, Ross A, Caballero B, Cousins R, eds. Modern Nutrition in Health and Disease. 10th ed. Baltimore, MD: Lippincott Williams & Wilkins; 2005.

8. Bułhak-Jachymczyk B.: Witaminy, [w:] Normy zywienia człowieka. Podstawy prewencji otyłości i chorób niezakaźnych, [red.] M. Jarosz, B. Bułhak- Jachymczyk, IŻŻ, PZWL, Warszawa, 172-232, 2008.

9. NHS Choices http://www.nhs.uk/Conditions/vitamins-minerals/Pages/Vitamin-B.aspx

10. Burns K.E. i wsp.: Reconstitution and biochemical characterization of a new pyridoxal- 5’-phosphate biosynthetic pathway, J. Am. Chem. Soc., 127, 3682–3683, 2005.

11. Tanaka T. i wsp.: Evolution of vitamin B6 (pyridoxine) metabolism by gain and loss of genes, Mol. Biol. Evol., 22, 243-245, 2005.

12. Linus Pauling Institute; Micronutrient Research for Optimum Health; Vitamin B6; http://lpi.oregonstate.edu/infocenter/vitamins/vitaminB6/

13. Medline Plus; http://www.nlm.nih.gov/medlineplus/ency/article/002402.htm

14. Rall L.C.: Vitamin B6 and immune competence, Nutr. Rev., 51, 217--225, 1993.

15. Leklem J.E.:Vitamin B-6. W: Shils M, Olson JA, Shike M, Ross AC, eds. Nutrition in Health and Disease. 9th ed. Baltimore: Williams & Wilkins;413-442, 1999.

16. Schnackerz K.D. i wsp.: Specific receptor sites for pyridoxal 5'-phosphate and pyridoxal 5'-deoxymethylenephosphonate at the alpha and beta NH2-terminal regions of hemoglobin, J. Biol. Chem.,258, 872-875, 1983.

17. Harvard School of Public Health. The Nutrition Source. Three of the B Vitamins: Folate, Vitamin B6, and Vitamin B12; http://www.hsph.harvard.edu/nutritionsource/ vitamin-b/

18. McCormick D.: Vitamin B6. W: Bowman B, Russell R, eds. Present Knowledge in Nutrition. 9th ed. Washington, DC: International Life Sciences Institute; 2006.

19. Leklem J.E.: Vitamin B6. W: Machlin L, ed. Handbook of Vitamins. New York: Marcel Decker Inc;341-378, 1991.

20. Ishihara J. i wsp.:Low intake of vitamin B-6 is associated with increased risk of colorectal cancer in Japanese men, J. Nutr., 137, 1808-14, 2007.

21. Clayton P.T.: B6-responsive disorders: a model of vitamin dependency, J. Inherit. Metab. Dis., 29, 317-326, 2006.

22. NIH Office of Dietary Supplements. Vitamin B12 Health Professional Fact Sheet; http://ods.od.nih.gov/factsheets/VitaminB12-HealthProfessional/

23. Institute of Medicine. Food and Nutrition Board. Dietary Reference Intakes: Thiamin, Riboflavin, Niacin, Vitamin B6, Folate, Vitamin B12, Pantothenic Acid, Biotin, and Choline. Washington, DC: National Academy Press, 1998.

24. 24. Linus Pauling Institute at Oregon State University; http://lpi.oregonstate.edu/ infocenter/vitamins/vitaminB12/

25. Majewska Monika: Niedokrwistość (anemia) złośliwa: przyczyny i objawy. Choroba Addisona- Biermera leczenie. http://www.poradnikzdrowie.pl/zdrowie/uklad-krwionosny/ niedokrwistosc-anemia-zlosliwa-addisona-biermera-objawy-leczenie_41938.html

26. Albert M.J. i wsp.: Vitamin B12 synthesis by human small intestinal bacteria, Nature, 283, 781-782, 1980.

27. University of Maryland Medical Center http://umm.edu/health/medical/altmed/ supplement/vitamin-b12-cobalamin

28. Briani Ch. i wsp.: Cobalamin Deficiency: Clinical Picture and Radiological Findings, Nutrients, 5, 4521–4539, 2013.

29. Oh R. i wsp.: Vitamin B12 deficiency, Am. Fam. Physician. 67, 979-986, 2003.

30. Neumann W.L. i wsp.: Autoimmune atrophic gastritis--pathogenesis, pathology and management, Nat. Rev. Gastroenterol. Hepatol., 10, 529-541, 2013.

31. Shane B.: Folic acid, vitamin B-12, and vitamin B-6. W: Stipanuk M, ed. Biochemical and Physiological Aspects of Human Nutrition. Philadelphia: W.B. Saunders Co.,483-518, 2000.

32. Ruscin J.M. i wsp.: Vitamin B(12) deficiency associated with histamine(2)-receptor antagonists and a proton-pump inhibitor, Ann. Pharmacother., 36, 812-816, 2002.