It’s official: We’re abusing our most precious organ. No, not your heart or brain, but your liver. We don’t think much about it and many of us don’t even know what it does (which is a lot). One-third of the nation has nonalcoholic fatty liver disease (NAFLD), a condition caused mainly by obesity and poor lifestyle choices. It can worsen over time and eventually put you on a liver transplant list. Additionally, a new study shows rates of liver cancer have doubled since the 1980s, making it one of the fastest-growing cancers in the U.S.