[delayed]

You might find Slime Mold Time Mold's "A Chemical Hunger" interesting: http://achemicalhunger.com/

> could there be a molecule that does the opposite?

Yes! It's sugar. And yes, it's highly addictive.

Processed food companies have been trying to find that for the last century and they've largely succeeded without specifying any particular molecule. You know Pringles chips?

Fun!

I propose that it's less about the molecule and more about the receptor, and the heuristically self-balancing system and the novel environment it finds itself in.

There are plenty of medicines that cause people to gain weight. Corticosteroids are notorious for increasing hunger leading to weight gain.

Legalizing weed was an inside job to sell WeGovy! Kidding, but the timing is a touch funny.

>could there be a molecule that does the opposite?

sugar