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Vitamin B-12 is a water-soluble vitamin, like all other B-vitamins
Methylcobalamin is the active coenzyme form of B12, while cyanocobalamin is a synthetic form requiring conversion in the liver
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These brands vary in what they contain, how much, and when to use them
The most common stuff is usually just a little pain or redness right where you got the shot
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US$ 22.14
