vitamins

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Vitamin B12 Cobalamin

Vitamins

Vitamin B12 Cobalamin

  • Required for nerve function, synthesis of DNA and RNA, metabolism of energy, enzyme reactions, and production of red blood cells.
  • Used therapeutically for heart health (lowers homocysteine), male infertility, prevention of neural tube defects, asthma, and cancer prevention.
  • Deficiency is common among the elderly and those with poor diets, pernicious anemia, depression, Alzheimer's, or malabsorption conditions (celiac disease).
  • Deficiency symptoms: anemia, appetite loss, constipation, numbness and tingling in the extremities, and confusion. Pregnant women with deficiency have increased risk of giving birth to a child with neural tube defects.
  • Drugs that deplete B12: acid-lowering drugs (omeprazole, lansoprazole, ranitidine), oral contraceptives, antibiotics, cholestyramine, and metformin.
  • Supplements are recommended for those over age 50, vegetarians, women planning to become pregnant, those with poor diets, and those at risk of heart disease.

  • Food Sources : Meat, poultry, fi sh, milk, and fortifi ed cereals
  • Adequate Intake : (mcg/day)
    Men = 2.4
    Women = 2.4
    Pregnancy = 2.6
    Lactation = 2.8
  • Upper Limit : Not determined
  • Side Effects : No adverse effects known with food or supplements


  • Vitamin B1 Thiamine
    Vitamin B2 Ribofl avin
    Vitamin B6 Pyridoxine
    Vitamin K
    Folate Folic Acid
    Vitamin E
    Vitamin B12 Cobalamin
    Vitamin C Ascorbic Acid
    Vitamin B3 Niacin
    Vitamin B5 Pantothenic Acid
    Vitamin D
    Biotin
    More ...

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