They are promoted widely in the wellness and longevity space and often taken together by injection as "stacks," for injury recovery, muscle growth and fat loss, improving athletic performance, enhancing metabolism and more
doi:10.1002/1099-0690(200301)2003:1 3.0.CO;2-I
Common side effects may include pain or redness at the injection site, mild diarrhea, or headaches [3]
In research models, it has been observed to influence angiogenic processes and support the organization of collagen fibers
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Vegans and vegetarians are at particular risk, since B12 is found almost entirely in animal products