Where do you get the info that he did speculate on his brain tumor from DMT smoking? Like to know that source, since I belive I have heard the most of his words, beeing it written or spoken at a lecture.. And never has I heard im mention it even - Maybe I was to stoned? =) Please do enlighten me, thanks. And to the thread starter; No - Pure DMT itself does NOT f*ck up your brain. In the sense of it beeing any physical harmful. In the way of your look and viewpoint on this world and what not, it might be seen as damage to the system (culture) you live in. It's ego-loss and creativy, healing and spirituality - All in the spirit molecule. DMT is practically medisin for the soul. Western medisin is drugs that makes you "forget" the pain you have. RIP T. Mckenna - Your great work will not be forgotten (at least not by me) Smile and you might make someone else smile - Good therapy for both. Cohn. =)