A Texas man needed a liver transplant after taking green tea extract, and his case isn't the first of its kind. Green tea supplements (but not actual green tea) have been linked to liver damage in the past, too.
As a meat-eating human, I always try to eat as much of any given animal as I can, even if that means removing its face from its skull. As such, I'm a big fan of offal-centric applications, particularly the surprisingly cheap and easily-executed chicken liver mousse.
Alcohol has some health benefits, but too much of the stuff can interfere with your health. Even if your drinking doesn't rise to the level of a true addiction, quitting temporarily appears to benefit your body.