Thus the best-known "function" of B 12 (that which is involved with DNA synthesis, cell division, and anemia) is a facultative function that is mediated by B 12 -conservation of an active form of folate which is needed for efficient DNA production
Remember, vitamin B12 plays a critical role in energy metabolism (3)
If you dont have a deficiency and youre just doing it because its trendy, you are putting a serious stain on your organs and if you have a misdiagnosed heart or kidney problem, you could make it worse or cause serious problems
In these cases, an injection bypasses the faulty digestive system, delivering B12 directly into the muscle where the body can use it
However, a low B12 level wont determine the cause of the deficiency, so further testing may be needed