The five most addictive substances on Earth – and what they do to your brain

So why are the drug companies not working on dopamine infusions direct to the brain? Kickstarter, anyone? 2/5 works for me. In other news, I quit a 2-3 pack a day smoking habit cold turkey about 30 years ago :-)
See: http://ift.tt/1RIYht5 Cross-posted from Facebook via IFTTT