8. Booze

It's almost impossible to find a weight loss expert who recommends alcohol for weight loss. (Believe me, I tried.) While some cocktails have fewer calories than others, alcohol just doesn't support weight loss. It contains empty calories that don't fill you up or provide any nutrients; softens your resolve so you're more likely to overeat; and impairs your judgement, regardless of your weight loss goals. (It's why you drunk-eat pizza, not salad.) But it gets worse: "When alcohol is present in your body, it's considered a toxin that your body wants to get rid of, and becomes you liver's top priority," says Dr. Caroline Cederquist, MD, creator of bistroMD. When your liver is in hardcore detox mode, it can't burn fat as efficiently. Because that's a major buzz kill, skip the buzz altogether if you're serious about losing weight. Or at least cut back on the booze, big time.