The original impetus seems to be from this tweet: https://mobile.twitter.com/AaronBergman18/status/1527333615763603456 https://mobile.twitter.com/AaronBergman1

The original impetus seems to be from this tweet: https://mobile.twitter.com/AaronBergman18/status/1527333615763603456 https://mobile.twitter.com/AaronBergman18/status/15273336157... > 12oz Diet Coke contains 100mg phenylalanine, which is an indirect precursor to dopamine and norepinephrine in the brain. If "leads to dopamine eventually via some pathway" were sufficient for dopamine, hoo boy, the field of psychopharmacology would look radically different. Would certainly make treating ADHD and Parkinson's way easier (and schizophrenia and mania way harder). Or, y'know, it's the caffeine. Especially since it doesn't cause the sugar spike/crash like regular soft drinks.