Is the rise of GLPs yet another case of Neal Stephenson called it again? I'm rereading Anathem and struck by similarities of Allswell and the psychoactive compo

Is the rise of GLPs yet another case of Neal Stephenson called it again? I'm rereading Anathem and struck by similarities of Allswell and the psychoactive components of GLPs. In the book, Allswell is a drug that gives people a sense of calm and well being, and is genetically engineered into food in a way that puts water fluoridation to shame. Otoh, the lower-caste slines of Arbre are also overweight so maybe the parallels are limited.