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26 terms

Vitamin B12

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folate
b12 is closely related to what other vitamin
regeneration of amnio acid methionine; sythesis of dna and rna
what does b12 and folate do
maintains sheath around nerve fibers (promotes normal growth)
what does b12 do
metabolism and bone activity
what depends on b12
hydrochoric acid and pepsin in stomach
wehre does b12 come from
attched to intrinsic factro that then goes to receptors in small intestine and then to blood stream
how is b12 absorbed
enterohepatic circulation route (secreted into bile and then to intestien for reabsorption)
waht route does b12 follow for REabsoprtion
2.4 ug
what is rda for adults in b12
not ABSORBED properly
what does b12 deficiency reflect
lack of hydrochlric acid or lack of intrinsic factor
what does inadequate absorption of b12 show
atrophic Gastritis or pernicious anemia
definciency disorders with b12
common condition in ppl over 50: damages cells of stomach
what is atrophic gastritis
vitamin b12 deficiency caused by atrophic gastritis and lack of intrinsic factor
what is pernicious anemia
yes. vitamin b12 must then be injected directly to blod stream
can people inherit defective gene for intrinsic factor dealing with b12
nasal spray
best way to give b12 to body
began diets
where does a prolonged inadequate inake occur
years and years
how long does it take vegans to develop deficiency
anemia of folate deficiency (vitamin b12 requred to convert folate from inactive to acive form); impairs performance on tests; short term memory; spatial ability
definciency symptoms of b12
exclusively derived from animals
b12 is different from other b vitamins how so?
meats and eggs
to protect from b12 definciency
soy milk or b12 supplements
if vegan can get b12 from
yeast, sea algae, fermented soy products
what doesnt contain active b12
microwave heating
what destroys b12
use oven or stovetop
how do you preseve b12
2.4 ug/day
b12 rda for adults
cobalamin
other name for b12