Whilst the theroy is there, this comment sums up the health implications.

Quote Originally Posted by UnitedWeFall
It's much more potent. I've taken weed out of used roaches to find it covered in sticky black stuff :thumbsup:
Smoke the "black stuff" and you'll be saying good bye...

The "black stuff" is tar, and all the carciongenic compounds are in it, and the "black stuff" sticks to your lung lining, meaning less THC can be abosorbed.

Each to their own, i'd rather live.