Not all alcohol abusers develop vitamin deficiencies and the main reason for differences between
individuals appears to be how well they eat. This often relates to socio-economic circumstances.
Additionally, a tendency to develop some deficiencies like that of thiamin may be partly inherited.
There has been much discussion about fortification of beer with thiamin in Australia because of
the enormous economic burden to the community of those who suffer brain and nervous system
damage (especially Korsakoff's psychosis) from thiamin deficiency due to alcohol abuse. If this
measure were taken, it would not decrease the risk of any other alcohol-related disease and could
lead to a sense of false security in the drinker.
The hangover after excessive drinking is in part due to dehydration and acidosis (a change in blood acid levels). It is not a reflection of vitamin deficiency and it is wrong to think that vitamin supplements can deal with the problem.