" Fig. 10-1: The road to hell is paved with good intentions. The same factors that increase dopamine (technology, lack of sleep, drugs, and bad diet) also decrease serotonin. Furthermore, stress drives dopamine release and also decreases the serotonin-1a receptor reducing serotonin signaling. Addiction results from dopamine receptor down-regulation coupled with excessive stress. Depression results from reduced serotonin transmission from the same precipitating factors, also coupled with excess stress. "

― Robert H. Lustig , The Hacking of the American Mind: The Science Behind the Corporate Takeover of Our Bodies and Brains