And if you think popping a Tylenol after a night of drinking will stave off a hangover, the opposite is true -- the pain reliever mixed with booze is like a double whammy to your liver. You're better off not mixing pain relievers and alcohol at all, but if you must, pick aspirin or ibuprofen.
Using weight-loss supplements
Losing weight is a pain in the ass, so it's easy to be lured in by the quick-fix promise of a supplement. But not only are these usually a waste of time and money, they aren't regulated by the FDA, which means they can be harmful -- especially to your liver.
Even supplements that claim to be herbal and all-natural can cause liver damage; a 2011 review found that several OTC weight-loss supplements were associated with liver toxicity, including green tea extracts, LipoKinetix, and Hydroxycut. If the results seem too good to be true, they probably are.
"It's important to know that not everyone will have a bad reaction to these products, but liver inflammation is often asymptomatic until there is significant liver damage. And by that time, the situation can be quite severe," Dr. Olsen warns.