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A biotech company says it put dopamine-making cells into people’s brains
(www.technologyreview.com)
This is a most excellent place for technology news and articles.
Caffeine and Alcohol are a bit weird, since they don't have the stigma that other drugs do.
If you say "Oh, I need a litre of coffee to function in the mornings", people would just laugh and agree, whereas if you said that you had to take your stimulant medication/dextroamphetamine to function/took the caffeine in pill form, people might judge you for it.
You see it a bit with social media, where people say that ADHD is merely an excuse for laziness, and that medication does more harm than it helps, but will happily excuse people needing a coffee to start up in the morning.