Folic Acid Supplementation may Minimize the Risk of Three of the Biggest Circulatory Diseases

November 23, 2002

A study, a so called meta analysis of 92 studies involving 20,669 patients, was published in the British Medical Journal (BMJ) the 23 November 2002.

Earlier studies have found a connection with a too high value of the substance Homocysteine in the body with coronary diseases like blood clots in the heart, blood clots in the legs, and in the brain.

Homocysteine is increased by deficiency of several vitamin Bs, especially vitamin B12, vitamin B6 and folic acid, and by a common genetic defect that reduces the activity of an enzyme in the folic acid metabolism. The result of this defect is a condition called “functional vitamin B deficiency”, which means a need for greater intake of folic acid in the exposed ones.

Increased homocysteine – no matter the cause – has shown to be significantly related to the three following diseases. By a reduction in the homocysteine of the blood of 3 mikromol/l it was possible to decrease the incidents of heart diseases with 16%. Deep venetrombose, with or without lung emboli, with 25%. The reduction in the frequens of blood cloths in the brain (strokes) was 24%.

The authors conclude:
That by reducing the homocysteine concentration with 3 mikromol/l (which alone can be obtained by increasing the folic acid intake, editor) the risk of heart disease can be reduced with 16%, the risk of deep venetrombose with 25%, and the risk of stroke with 24%.

By: Per Tork Larsen, DSOM

Reference:
British Medical Journal; Nov, 2002.

www.bmj.com
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Vitamin B12, Research references

January 1999

1. Allen, LH, Casterline J. Vitamin Bl2 deficiency in elderly individuals. diagnosis and requirements. Am J Clin Nutr 60: 12-14, 1994.
2. Baker H et al. Plasma vitamin B12 titres as indicators of disease severity and mortality of patients with alcoholic hepatitis. Alcohol Alcoholism 22; (1):15, 1987.
3. Brinton LA, Gridley G, Hrubec A et al. Cancer risk following pernicious anemia. Br J Cancer 59: 810-813, 1989.
4. Campbell RE, Pruitt FW. Vitamin B12 in the treatment of viral hepatitis. Am J Med Sci 224:252, 1952.
5. Campbell RE, Pruitt FW. The effect of vitamin B12 and folic acid in the treatment of viral hepatitis. Am J Med Sci 229:8-15, 1955.
6. Carethers M. Diagnosing vitamin Bl2 deficiency, a common geriatric disorder. Geriatrics 43: 89-112, 1988.
7. Chu RC, Hall CA. The total serum homocysteine as an indicator of vitamin Bl2 and folate status. Am J Clin Pathol 90: 446-449, 1988.
8. Dalery K et al. Homocysteine and coronary artery disease in French Canadian subjects: Relation with vitamins B12, B6, pyridoxal phosphate and folate. Am J Cardiol 75:1107-11, 1995.
9. Davidson S. The Use of Vitamin B12 in the Treatment of Diabetic Neuropathy. J Flor Med Assoc 15: 717-20, 1954.
10. Doscherholmen A, Swaim WR. Impaired assimilation of egg 57 Co vitamin Bl2 in patients with hypochlorhydria and achlorhydria and after gastric resection. Gastroenterol 1973; 64: 913-919.
11. Ellis FR, Nasser S. A pilot study of vitamin B12 in the treatment of Tiredness. Br J Nutr 30: 277-83, 1973.
12. Gaby SK, Bendich A. Vitamin intake and health: A scientific review. New York: Marcel Dekker. p 193-197, 1991.
13. Gaby AR. The story of vitamin B12: Is vitamin B12 a panacea or placebo? Nutrition & Healing 2; 7, July, 1995.
14. Goodman KI, Salt WB 2nd. Vitamin B12 deficiency. Important new concepts in recognition. Postgrad Med 88; 3: 147-50, 153-8, 1990.
15. Gupta AK, Mital H.S. Cyanocobalamin (vitamin B12) in the management of Herpes Zoster. Indian Pract 20; (7):457-9, 1967.
16. Harriman GR et al. Vitamin B12 malabsorption in patients with acquired immunodeficiency syndrome. Arch Intern Med 149; (9):2039-41, 1989.
17. Heyblon R. Vitamin B12 in herpes zoster. Abstract. JAMA 146:1338, 1951.
18. Herbert, V. Vitamin B-l2. In: Present knowledge in nutrition. 7th edn. Washington DC: International Life Sciences Press. 1996: p 191-205.
19. Heimburger DC, Alexander CB, Birch R, Bailey WC, Krumdieck CL. Improvement in bronchial squamous metaplasia in smokers treated with folate and vitamin Bl2. J Am Mcd Assoc 259: 1525-1530, 1988.
20. Herbert V. B12 deficiency and AIDS. Letter. JAMA 260; (19):2837, 1988.
21. Herzlich BC et al. Synergy of inhibition of DNA synthesis in human bone marrow by azidothymidine plus deficiency of folate and/or vitamin B12? Am J Hematology 33:177-83, 1990.
22. Hjelt K, Krasilnikoff PA. The impact of gluten on haematolgical status, dietary intakes of haemopoietic nutrients and vitamin B12 and folic acid absorption in children with coeliac disease. Acta Paediatr Scand 79; (10):911-19, 1990.
23. Inada M, Toyoshima M, Kameyama M. Brain content of cobalamin and its binders in elderly subjects. J Nutr Sci Vitaminol 28: 351-357, 1982.
24. Kokkonen J, Similä S. Gastric function and absorption of vitamin B12 in children with celiac disease. Eur J Pediatr 132; (2):71-5, 1979.
25. Lederle FA. Oral cobalamin for pernicious anemia. Medicine’s best kept secret? JAMA. 265: 94-95, 1991.
26. Nilsson-Ehle H, Landahl S, Lindstealt G et al. Low serum cobalamin levels in population study of 70- and 75-year-old subjects. Dig Dis Sci 34: 716-723, 1989.
27. Olszewski AJ, Szostak WB, McCully KS. Plasma glucosamine and galactosamine in ischemic heart disease. Atherosclerosis 75:1-6, 1989.
28. Omaye ST. Nutritional and toxicological aspects of food safety. New York: Plenum Press. p 169-203, 1984.
29. Richardson LR, Brock R. Studies of reproduction in rats using large doses of vitamin Bl2 and highly purified soybean proteins. J Nutr 1956; 58: 135-145.
30. Robertson KR et al. Vitamin B12 Deficiency and Nervous System Disease in HIV Infection, Arch Neurol 50:807-11, 1993.
31. Rule SAJ et al. Serum vitamin B12 and Transcobalamin levels in early HIV Disease. Am J Hematol 47:167-71, 1994.
32. Shemesh Z et al. Vitamin B12 deficiency in patients with chronic tinnitus and noise-induced hearing loss. Am J Otolaryngol 14; (2):94-9, 1993.
33. Shils ME, Young VR. Modem Nutrition in Health and Disease. 7th edn. Lea and Febiger. p 401-404, 1988.
34. Tang AM, Graham NM, Chandra RK, Saah AJ. Low Serum Vitamin B-12 concentrations are associated with Faster Human Immunodeficiency Virus type 1 (HIV-1) disease progression. J Nutr 127:345-51, 1997.
35. Ubbink JB, Vermaak WJH, van der Merwe A, Becker PJ. Vitamin B-12, vitamin B-6, and folate nutritional status in men with hyperhomocysteinemia. Am J Clin Nutr 57: 47-53, 1993.
36. Uchizyama M et al. Effects of vitamin B12 on human circadian body temperature rhythm. Neurosci Lett 192: 1-4, 1995.
37. Verhoef P, Stampfer MJ, Buring JE, et al. Homocysteine metabolism and risk of myocardial infarction: Relation with vitamin B6, B12, and folate. Am J Epidemiol 143:9:845-59, 1996.
38. Wright J.V. Treatment of childhood asthma with parenteral vitamin B12, gastric reacidification, and attention to food allergy, magnesium and pyridoxine: Three case reports with background and an integrated hypothesis. J Nutr Med 1: 277-82, 1990.

 

Sources
Joseph E. Pizzorno Jr., Michael T. Murrey & Melvyn R. Werbach.