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  1. #1
    ECFATCAT's Avatar
    ECFATCAT is offline Associate Member
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    Vitamin b12 and why you need it to grow

    Vitamin B12

    Introduction -- Functions --

    Introduction

    Vitamin B12 is a member of the vitamin B complex. It contains cobalt, and so is also known as cobalamin. It is exclusively synthesised by bacteria and is found primarily in meat, eggs and dairy products. There has been considerable research into proposed plant sources of vitamin B12. Fermented soya products, seaweeds, and algae such as spirulina
    have all been suggested as containing significant B12. However, the present consensus is that any B12 present in plant foods is likely to be unavailable to humans and so these foods should not be relied upon as safe sources. Many vegan foods are supplemented with B12. Vitamin B12 is necessary for the synthesis of red blood cells, the maintenance of the nervous system, and growth and development in children. Deficiency can cause anaemia. Vitamin B12 neuropathy, involving the degeneration of nerve fibres and irreversible neurological damage, can also occur.

    Functions

    Vitamin B12's primary functions are in the formation of red blood cells and the maintenence of a healthy nervous system. B12 is necessary for the rapid synthesis of DNA during cell division. This is especially important in tissues where cells are dividing rapidly, particularly the bone marrow tissues responsible for red blood cell formation. This is important for muscle tissue growth.If B12 deficiency occurs, DNA production is disrupted and abnormal cells called megaloblasts occur. This results in anaemia. Symptoms include excessive tiredness, breathlessness, listlessness, pallor, and poor resistance to infection. Other symptoms can include a smooth, sore tongue and menstrual disorders. Anaemia may also be due to folic acid deficiency, folic acid also being necessary for DNA synthesis.

    B12 is also important in maintaining the nervous system. Nerves are surrounded by an insulating fatty sheath comprised of a complex protein called myelin. B12 plays a vital role in the metabolism of fatty acids essential for the maintainence of myelin. Prolonged B12 deficiency can lead to nerve degeneration and irreversible neurological damage.
    When deficiency occurs, it is more commonly linked to a failure to effectively absorb B12 from the intestine rather than a dietary deficiency. Absorption of B12 requires the secretion from the cells lining the stomach of a glycoprotein, known as intrinsic factor. The B12-intrinsic factor complex is then absorbed in the ileum (part of the small intestine) in the presence of calcium. Certain people are unable to produce intrinsic factor and the subsequent pernicious anaemia is treated with injections of B12.

    Vitamin B12 can be stored in small amounts by the body. Total body store is 2-5mg in adults. Around 80% of this is stored in the liver.
    Vitamin B12 is excreted in the bile and is effectively reabsorbed. This is known as enterohepatic circulation. The amount of B12 excreted in the bile can vary from 1 to 10ug (micrograms) a day. People on diets low in B12, including vegans and some vegetarians, may be obtaining more B12 from reabsorption than from dietary sources. Reabsorption is the reason it can take over 20 years for deficiency disease to develop in people changing to diets absent in B12. In comparison, if B12 deficiency is due to a failure in absorption it can take only 3 years for deficiency disease to occur.

    B12 has very low toxicity and high intakes are not thought to be dangerous.

  2. #2
    gundam675's Avatar
    gundam675 is offline Senior Member
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    good post !

  3. #3
    motoxxxguy's Avatar
    motoxxxguy is offline Anabolic Member
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    Now if we only knew where to buy B12....

    -moto

  4. #4
    Money Boss Hustla's Avatar
    Money Boss Hustla is offline Retired Moderator
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    Originally posted by motoxxxguy
    Now if we only knew where to buy B12....

    -moto

  5. #5
    KeyMastur is offline VET
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    Originally posted by gundam675
    good post !
    yes, good post, but please EFC, give credit where credit is due. you didn't type that up, so how's about a little bibliography ?? here, i'll help you out :

    originally written up in the seller's (name a secret) emails.

    yes, i said seller. but don't PM me expecting me to give you the email. i really don't care if it's legal or not. if you're in need to know, you can find out elsewhere.

  6. #6
    dovecand2 is offline New Member
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    So umm how about a little info

    Ok im going down to tijana with my mom soon and she is all for the B-12 stuff and i wanna take it b/c im starting a cycle and stuff and i figure i get a bottle of b12 and roidz and pass it off as another type of vitamin b/c it is just Vitamin-S haha but yeah i read on Web MD that you inject into the vein now that is kinda wierd b/c i thought it was suppose to be injected into the muscle but im probably gonna get my mom used to take them just cause from her doc but yeah where do i inject in the muscle or the vien or am I lost a little bit some helpwould be appreciated so holla at a nigga and give a bro some help

  7. #7
    ECFATCAT's Avatar
    ECFATCAT is offline Associate Member
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    credit where it is dew ..

    It was taken from a medical text book .... By (buyb12 @ www.lionNutrition.com)
    Attached Thumbnails Attached Thumbnails Vitamin b12 and why you need it to grow-12121.jpg  
    Last edited by ECFATCAT; 06-24-2003 at 09:57 PM.

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