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Cardiovascular Prevention and Pharmacotherapy, 4 (4), 142148.

Although vitamin B12 tablets are sold in large dosages well beyond the recommended dietary limit, these quantities do not guarantee that the total portion will be absorbed because sufficient amounts of intrinsic factors are also required

NNMT is an enzyme expressed in adipose tissue, the liver, and other tissues

Most people barely feel more than a small pinch

A deficiency of vitamin B12 is fairly difficult to diagnose and there are quite a few variables that can lead to the deficiency or just not quite having enough of it regularly, so injections of vitamin B12 can benefit quite a few people who suffer from symptoms including brain fog, fatigue, lethargy, feelings of depression, tingling in their hands or feet, dizziness, and memory loss