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Image: Michail_Petrov-96/Thinkstock Vitamin B12 may not be high on your nutritional radar, yet it is essential to some of the body's most important functions, like forming red blood cells and maintaining nerve function
Transcobalamin is the bioactive form of the vitamin and is taken up by all tissues, whereas haptocorrin is only taken up by the liver
However, for most people with normal B12 levels, supplementation or injections do not significantly affect metabolism or fat loss
For intramuscular injections, we send two needles: a 23 gauge to use to draw in the medicine, and a 25 gauge for the injection itself (some individuals may use this for a subcutaneous injection, after a little experience)
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