That's interesting, thanks for that update. I've been following this thread and read all the articles. Some atrticles still stand hard on their "fact" that marijuana can increase risk of heart attack and then the synthetics upping that risk even more. However if 2 only had THC metabolites and the other some JWH metabolites then what exactly happened? The articles doesn't state exactly what "K2" is. I know we all assume it's one of the newer synthetics. However a visit to the cannabis board shows many people using synthetics (as well as marijuana) heavily and not having heart attacks. We'd have heard if some of the older synthetics (like jwh-018 ) caused heart attacks more often at the rate they seem to be used.
So I agree to, something was out there different for these 3. Maybe some shady blend sprayed with something crazy. Some crazy gas station spraying some herbs with gasoline??
I should say although I am not a user of blends, about 2 years back I did have about 500 mgs of jwh-018. 1-2 milligrams proved to be an excellent substitute for marijuana. Occasional use only. And like LSD was to the 60's (feared and revered) I feel the synthetic cannabinoids are the same. The whole chromosome damage, legally insane BS that was thrown at LSD is similar to the stuff we see about a jwh substance. I agree caution is necessary and unknown blends are just plain dangerous, but I think there is more to this story.
Just my worthless opinion.

If I need a cannabinoid I do stick with mj. But a small amount of a jwh seems ok too. I do not think these synthetic cannabinoids are poison. But I do think good ol mj is the thing to reach for. I just can't stand the media as well as doctors.