B12 Summary - Allison L. Marsh Jessica L. Griffin Sarah...

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Allison L. Marsh Jessica L. Griffin Sarah Budo Vitamin B12 Vitamin B12 is a complex water-soluble organic compound essential to a plethora of microorganisms and animals. It has two active forms: Methylcobalamin and 5- deoxyadenosylcobalamin, which play a role in cellular metabolism. The recommended daily allowance is about 2.4 mcg for the average adult and 2.6 mcg for pregnant women. Because vitamin B12 is considered to be non-toxic, much higher levels can be taken with no adverse effects either short or long term. Even though it is to be considered non-toxic, the maximum safe level is set at 3,000 mcg even though a higher intake will not cause harm. B12 can be found in meats, dairy products, eggs, shellfish and fortified cereals. Deficiency of B12 is rare. However, those most often seen as being B12 deficient are vegans who ingest no animal protein or any animal by-products. If a vegan does not supplement their diet with B12, it is very likely they will be deficient. Deficiency symptoms include: Anemia, Weakness, Lethargy, Numbness/Tingling, Memory Loss, Dizziness, Lack of Balance, Depression, Digestive problems, Headaches, and Vision problems. Very often however, there can be no symptoms at all. You can have a Primary or a Secondary deficiency of B12. A primary deficiency occurs when an organism does not get enough of the vitamin in its food. Conversely, secondary deficiency may be due to an underlying disorder that prevents or limits
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This note was uploaded on 03/09/2010 for the course MARB 1000 taught by Professor Hayes during the Spring '07 term at Texas A&M University-Galveston.

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B12 Summary - Allison L. Marsh Jessica L. Griffin Sarah...

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