SOURCES OF B12 B12 can be found in a variety of food sources
Importantly, functional B12 deficiency can sometimes coexist with high total B12 levels, especially in kidney disease, and may require additional testing with methylmalonic acid (MMA) or holotranscobalamin if deficiency is suspected clinically
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They give great feedback on what you should expect and advice
How to Choose Between Shots and Supplements Deciding whether to opt for B12 shots or oral supplements ultimately depends on your unique situation
Vitamin B12 is the "generic descriptor" name for any of such vitamers of vitamin B12
