system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How come when I eat a decent amount of fruit/veggies, I don't feel satisfied. But a $1 cheesebuger leaves me full for hours?

I ate two oranges, an apple, and a banana earlier in one sitting. I felt like I could've eaten a few more. But when I eat 1 cheeseburger, I feel full for hours. What's up?
gpt
Fat and protein lead to a lot more satiety when eaten. Vegetables can also make you feel full as a virtue of the fiber content. Oranges, apples and bananas also have a little fiber, but they also have sugar, which will often make you feel hungrier than had you eaten nothing due to how insulin and leptin work.