What exactly is B12 for?

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16 Comments

  1. In a nutshell: energy

  2. Well, specifically... Vitamin B12 is very important for DNA replication, normal nerve cell activity, tissue and cellular repair, and RBC (red blood cell) formation.
    And then it gets complicated...
    There are two enzymes that cannot perform without B12:
    - Methylmalonyl Coenzyme A Mutase (MCAM)
    - 5-Methyltetrahydrofolate-Homocysteine Methyltransferase (5MHM).
    An enzyme is a protein that accelerates a chemical reaction. So, these are functions of Vitamin B12 because they are two things that are dependent on Vitamin B12 that produce changes in chemical reactions.
    MCAM is an enzyme involved in key metabolic pathways. A metabolic pathway is a series of chemical reactions occurring within the cell. So basically, MCAM is directly involved with metabolism.
    5MHM is an enzyme that is responsible for producing methione. Methione is an amino acid, which is a building block of protein.
    Neither of these enzymes can function without B12, so the vitamin acts as a kind of trigger for these two very important reactions.
    Hope that helps.

  3. WOW! Thanks Diamond and Young... So... Would you guys say its a good thing to take when trying to lose weight?

  4. id say consume it as part of a normal diet should gif enough on a daily basis whih plus all the other stuff
    also less shots and more monies

  5. I am not a nutritionist, but your body functions at peak efficiency when it is not nutrient deficient, so you should find a way to determine how much B12 your body needs and try to hit that goal every day.
    The RDA recommends about 2.5mcg of B12 a day, so your own body's needs may vary from that, or it may not.
    It's always good to get all your vitamins, so if your diet doesn't have very much B12 content, you may want to consider a supplement.

  6. Thanks!

  7. the b-vitamins should be taken altogether in a balanced complex. overdosing on b12 will do you no good if you don't have a balanced complex of all the b-vitamins to work with it.
    that being said, if you are deficient in b12, then by all means take a supplement. anemia and poor oxygen circulation are two deficiency effects i can think of. will it give you an extra dieting boost to up the b12? meh.

  8. thanks

  9. I bought a bottle of B12 from GNC a few months back...
    it said "carbohydrate metabolism" on the bottle.
    Not sure what that means, and I have yet to open the bottle! I'm a pill hoarder like that. I like to buy the vitamins and not take them.

  10. Me too! LOL I bought a bottle of b12/b6 pills from trader joes that goes under the toungue. I have yet to try them... :)

  11. I have about a million bottles of various vitamins, medications, etc, that are only missing about half a dozen pills.
    I tend to start a lot of things and not finish them.

  12. in my nutrition class.. i was told that humans do not need a lot of b12, so most people do not need supplements. With the exception of vegetarians, because there are very few non-animal sources for b12. though, on that list is seaweed (which i personally love), so if youre a vegetarian sushi lover you're likely covered.

  13. For ages, they have said it's for the immune system. Vegetarians, for decades, have been told to take a multi-B supplement, because there are few non-meat/non-dairy sources of B12.
    Theory says that the body flushes out excess B all at once...not individual sub-B at a time. Thus, if you supplement with B12 only, then the body, while flushing the excess, will dump ALL of your B6...making you B6 deficient. So you take a multi-supp for B.
    Lack of B12 is called "anemia". You can cause B12 deficiency two main ways - a meat and dairy-free diet, or consuming too many onions, which causes a B12 flush (aka anemia).
    I have never seen anything in the medical literature correlating B12 with weight loss.

  14. B12 and other B vitamins help your nervous system, immune system and general brain health. It also helps to counteract the effects of smoking. Many false positive tests on AIDS are attributed to B12 deficiencies.

  15. It is calming

  16. If one has any autoimmune disease, it is worthwhile to periodically test your B12 levels. [there is a blood test.] If you have one autoimmune disase, you are more likely to have another, and one autoimmune process attacks the substances in your digestive system that extract B12 from food.
    If you do not have a deficiency, the amount in a standard multivitamin is enough. If you have pernicious anemia [the type cause by autoimmunity], you will likely need to take megadoses of B12 recommended by your doctor. Shots are no longer considered the only way to get B12 if you have pernicious anemia.
    As for what it does, read this:
    http://ods.od.nih.gov/factsheets/vitaminb12.asp

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