Okay, I am going to show you something kind of gross. You REALLY need to see it, especially if you think liver health is mainly related to alcohol intake.
Both of these are livers. The BEAST of a liver on left is a "fatty liver" and the one on the right is a normal liver. Years ago, the main cause of a fatty liver was excessive alcohol intake. These days, not as much. A diet high in sugar, refined carbohydrates and processed foods, along with a sedentary lifestyle, has contributed to Non-Alcoholic Fatty Liver Disease (sometimes referred to as NASH). Liver cells accumulate more and more fat until the liver is essentially choking on the excess fat. This can lead to scarring, cirrhosis, liver failure and liver cancer.
Risk factors for a fatty liver include: a diet that is high in sugar, refined carbohydrates and/or fast food; visceral obesity (waist circumference 40 inches or more in men or 35 inches or more in females); being overweight/obese; insulin resistance; a high level of fats in your blood (triglycerides).