What if GLP-1s like Ozempic could do more than just tip the scales? Physician Dhruv Khullar traces the winding path of the "moderation molecule" — from a discovery in Gila monster saliva to a potential diabetes medication and addiction treatment — and how they could quiet the relentless noise of craving. The most surprising effects of GLP-1s may not be in the gut, but in the brain.