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Yes, they make you feel full... until your blood glucose level drops 1-3 hours later, then you feel very hungry again.

By contrast, if I eat a fat and protein based meal, there is no blood sugar drop to instigate a 'fake' hunger signal, so I don't begin to feel hungry for 4-7 hours or so.

Depends on the person. I can eat stupid amounts of fruit and vegetables... Low-carb is the only way I can not feel hungry.

Of course, the general population does like their carbs to be the refined type.

I can easily get full from starchy/fibrous foods, but then I feel hungry again 1 hour later. Fat/protein rich foods, in contrast, keep me full for 4-8 hours.