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Three authors (MM, AN, and JV) independently screened titles and abstracts following de-duplication
Because B12 is water-soluble, the NIH Office of Dietary Supplements notes that no tolerable upper intake level has been established excess B12 is excreted by the body rather than accumulating to toxic levels
Patients should inform their healthcare provider of all supplements they use
People who can benefit most from taking a vitamin B12 supplement include those who: Are over the age of 50, since aging can result in a decline in hydrochloric acid production in the stomach, which is needed to absorb the vitamin B12 present in foods
Plays a role in mood regulation and insulin sensitivity
Broadly speaking, B12 injections give the body further resources to produce more red blood cells to carry larger amounts of oxygen throughout the body, meaning those who receive such treatments can benefit from increased energy and reduced feelings of fatigue
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