This is one of the problems with recreational drug studies. Its hard to find people who only do one drug and then people who live similar life styles to them bu

This is one of the problems with recreational drug studies. Its hard to find people who only do one drug and then people who live similar life styles to them but sober. I remember and MDMA study that looked at ravers in Utah because a large number of them were sober to study the effects of MDMA while accounting for the raver lifestyle of staying up for many hours dancing and often dehydrated.