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I purchased the home kit as well and the staff is very helpful with all my questions
Administer via intramuscular injection or intravenous (IV) injection
B12 levels can become low as a result of inadequate nutrition, decreased absorption of this vitamin in the intestines, stomach problems, infections or cancer
Absorption from an intramuscular dose has been measured between 55% and 97%
Cobalamin injections are extremely safe
The muscle is obviously deeper than your subcutaneous tissue (you can see the image above for reference)
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