> its supposed to make you feel full longer (as I understand it, someone feel free to correct me on that).
It's complicated. This is commonly reported by people taking it, but it's not the only mechanism. Also commonly reported are that it reduces hunger levels flat out across the board, makes you feel full after eating less food, and that as you get used to eating less food your stomach physically gets smaller and you can't even eat as much food at all even if you tried to force yourself to (e.g. at a big holiday meal full of delicious food where you want to eat everything so long as physically able to, well past the point of hunger).
It's complicated. This is commonly reported by people taking it, but it's not the only mechanism. Also commonly reported are that it reduces hunger levels flat out across the board, makes you feel full after eating less food, and that as you get used to eating less food your stomach physically gets smaller and you can't even eat as much food at all even if you tried to force yourself to (e.g. at a big holiday meal full of delicious food where you want to eat everything so long as physically able to, well past the point of hunger).