If people eat a lot of fructose, their body breaks it down in the gut and liver, and that process can turn the sugar into fat, which may build up in the liver over time.

When scientists block a specific enzyme in mice that breaks down fructose (a sugar), the mice’s livers work better and store less fat—suggesting that how the body processes fructose might be what causes the damage.

Eating a lot of fructose (like in sugary drinks) might turn up the activity of certain liver enzymes that process sugar and make fat, especially in people who already have metabolic problems like obesity or diabetes.

Eating too much fructose, like from sugary drinks, makes your liver turn it into fat, which can build up and lead to fatty liver disease—even if you don't drink alcohol.

When animals eat fructose, their liver breaks it down super fast without needing insulin, turning it mostly into glucose and lactate — and this might mess with the liver's energy and lead to health problems if it happens too much.

Eating too much fructose—like the sugar in soda and candy—can slow down your liver’s ability to burn fat, making fat build up and mess up your metabolism.