Mostly too many calories. Fruit isn't 'bad' as much as 'it's really hard to consume so many calories with all that fiber in the way'. But if you process fruit

Mostly too many calories. Fruit isn't 'bad' as much as 'it's really hard to consume so many calories with all that fiber in the way'. But if you process fruit by removing that fiber, as say fruit juice, you're easily consuming tons of calories.