As a frequently lapsing ex-caffeine-junkie, I find this really interesting.

“[Caffeine] drinkers develop a tolerance to both the anxiety-producing and the stimulating effects of caffeine, meaning that it only brings them back to baseline levels of alertness, not above them.

The full study is here.

On a related note, since Forbidden Flavours closed, we haven’t been able to find a good source of well decaffeinated coffee. Most nice tasting decaf beans end up not being very decaf. Forbidden Flavours roasted and sold espresso beans that were quite well decaffeinated, so I could have a couple of double shot lattes and not feel it. Anything we’ve bought since then has given me the shakes after one good double shot.

The least-caffeinated decaf we’ve found so far is *shudder* Starbucks. Anyone else care about this sort of thing and have any opinions?