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Other injections may use synthetic forms that may not have as effective absorption in the body
The most common B12 injections are hydroxocobalamin and cyanocobalamin
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The capsules contain the same research-grade compound supplied in the vial format and are tested to the same purity specification
Blood levels quickly rise to 560,000,000pmol/L, and if necessary, treatment is repeated within hours for a total of 10,000,000mcg of B12