The question in the title: Why a glucagon receptor agonist in a weight-loss compound is not a contradiction I will give what I have already checked below so nobody repeats it.
I would like to disagree carefully with the settled view on glucagon receptor agonist, and I would like to be argued out of it if the disagreement is bad.
The disagreement is about one step, not about the conclusion. If the step holds I withdraw it entirely.