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Home Articles Vitamins Vitmains B1, B6, B12

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Expert Pearls

Vitamin B1 - Red cell transketolase

Red cell transketolase is best assessment test. [J Am Coll Nutr, 1988;7(1):61-67. 29204 (1998)] Summary Interview

Vitamin B12 - Aging

Aging - maybe 5 to 10% of elderly individuals may be deficient with neurologic damage, without megaloblastic anemia or a high MCV. [Am J Clin Nutr, 1994;60:2-11. 20547 (1996)] Summary Interview

Vitamin B12 - Methylmalonic acid

Methylmalonic acid elevated in the absence of anemia and macrocytosis may indicate a vitamin B12 deficiency. [Am J Clin Nutr, 1994;60:2-11. 20547 (1996)] Summary Interview

Vitamin B12 - Vitamin B12

Vitamin B12 647 mcg/d or more P.O. normalized biochemical markers of B12 insufficiency (methylmalonic acid) [Arch Intern Med, 2005 May 23;165(10)1167-72. 43594/43599 (3/2006)] Summary Interview

Vitamin B12 - Vitamin B12 - 2

Vitamin B12 deficiency is common in autoimmune thyroid disease. [Am J Med Sci; 2006; 332(3):119-22. 45530 (12/2007)] Summary Interview

Vitamin B12 - Vitamin B12 - 3

Vitamin B12 needs to be supplemented in vegan diet. [J Nutr Med, 1994;4:431-439. 21878] Summary Interview

Vitamin B12 - Vitamin B12 - 4

Vitamin B12 normal ranges should be 600 to 2000 pg/ml. Below 550 to 600 pg/ml deficiencies start to appear in the CSF. Humans are born with serum levels of about 2000 pg/ml, which decline gradually throughout life. [Medical Hypotheses, 1991;34:131-140. 28725 (1998)] Summary Interview

Vitamin B6 - Pyridoxal phosphate

Pyridoxal phosphate and pyridoxal are the best assessments tests. [Biochemical and Metabolic Biology, 1994; 52:10-17. 20478 (1996)] Summary Interview
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