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The critical concept here is bioavailability which is just a fancy word for how much of a nutrient your body can actually absorb and put to work
B12: Neurological Function & Mental Clarity Essential for myelin sheath synthesis the protective coating around nerve fibers
If you are a strict vegan, for example, you are more likely to suffer deficiencies of various nutrients
But if your deficiency is caused by an absorption problem, lifestyle tweaks will not replace the injection schedule, they only support it
There are some supplies needed for subcutaneous injection
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