Genetically modified addictive substances

In this episode your favorite magician explains how the government genetically modified addictive substances to subliminally decrease substance abuse across the board by making substances less desirable.
It even increased overdoses since fentanyl doesn't create the same amount of euphoria that oxycodone or other opiates have thus causing the user to ingest more and more until they overdose.
Cigarettes, amphetamines, cocaine, opiates, and even cannabis have had the molecular structure altered by the FDA to create less euphoria in the brain thus reducing use of these substances across the board.