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While B vitamins are essential for overall health, the evidence on whether vitamin B helps with hangovers is inconclusive
In humans, cyanocobalamin must undergo intracellular enzymatic conversion to the active coenzyme formsmethylcobalamin and adenosylcobalaminwhich, depending on the pH environment, can interconvert with hydroxocobalamin ( Despite extensive biochemical knowledge of cobalamin metabolism and its physiological importance, the optimal supplementation route for maintaining or restoring adequate vitamin B12 levels remains debated
Below is a clinicians view of who actually needs B12 injections, how often, what the NHS will and will not do for you, and what we check before we book the first shot
This matters because many adults with low B12, whether from dietary restriction, aging, or conditions like pernicious anemia, cannot absorb enough B12 through food or oral supplements alone
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