What does vitamin b1 do for someone who has relapsed into drinking after a year and is this a safe way to start making them feel betterthemorningafter?

Prevent brain damage: Many heavy drinkers become deficient in b1 & this can cause permanent brain damage; thus taking b1 (ideally as part of a b complex) can prevent this. I don't think it will do much to help with hangovers. 30% of alcoholics have pyroluria & treating this can reduce cravings. High doses of b3 may also reduce cravings. See http://www.The-alcoholism-guide.Org/orthomolecular-alcoholism-treatment.Html.