Moderation in everything. Before I took up brewing I was working out at the gym every day because I thought I was fat. Well 14% bodyfat (at 6'2") didn't sit too well with my body and I became sickly and ill. I've since gained the weight back and started to feel better (had to work hard to gain the weight back because it's just not the way my body works, but I mananged to do so).
A couple beers a week doesn't kill me.
Any more than that and I'm sure I'd start to gain unwanted weight or feel poor.
I've learned a lot while brewing and can now walk into a bar and sound like I know what I'm talking about by ordering an IPA, Porter, Stout etc. and be able to tell if the beer is made well. So far Leine's Snowdrift Vanilla Porter is my favorite. Tonight even the bartender said she admitted the vanilla in the porter made it more bitter than she liked. But I tend to like the more bitter beers.
Anyway, just rambling on the Internet. Good luck with your weight loss/gain. Balance is hard to find and maintain.
I am also a sucker for the snowdrift. I keep my drinking to 5 beers a week on average. I have moved from eating red meat to more fish. My boy is a little behind in the school department and since we started getting more omega 3 fats he seems to be doing better. Typically when I want to lose weight I just stop eating refined sugars.