I got a blood panel workup in which they also tested for certain vitamin and mineral deficiencies shortly after I quit drinking. I'd recommend doing this if you haven't already. As others have mentioned we aren't the healthiest of eaters when drinking but even if we do manage to eat relatively healthy alcohol prevents our bodies from absorbing a lot nutrients. I was deficient in folic acid and a bit low on vitamin D so my dr. put me on a b supplement for a while and recommended I get more sun. Nothing excessive but around 15-20 mins a day. I ate like crap and lived like a hermit when I was drinking so this all came as no surprise.
I agree with others if you are eating a healthy diet you shouldn't need to take any supplements but some of us may need a little extra help in the beginning to get back on track.