I'm pre-diabetic, and my Hemoglobin A1c was inching above the upper limit of normal, so I started on a very old anti diabetes drug - Metformin.
It decreases the amount of glucose you absorb from your food and the amount of glucose made by your liver. Metformin also increases your body's response to insulin. So it only works for Type II (adult-onset) diabetes.
I'm only bringing this up because I made an unexpected discovery - while my appetite is unchanged, I reach satiety much faster than I used to - i.e., if I pay attention, like asking myself if I really want to finish my plate or have a second helping, my answer is not really - I'm full.
That is in fact surprisingly similar to the effect of all these new GLP-1 drugs that cost a fortune.
Did I mention Metformin is a very old drug? In other words, its dirt cheap.
I don't want to pretend it is as effective, but my experience with Metformin was eye-opening.