I still need to get use to this forum software. I just accidentally deleted a thread due to a glitch. The thread was about the mescaline content of San Pedro (Trichocereus Pachanoi) vs Peruvian Torch (Trichocereus Peruvianus). Since it is an essential topic, let's dedicate this thread to the difference in potency of all Trichocereus species. In other words: What is the most potent Trichocereus? Peruvian Torch is said to contain more mescaline than Trichocereus Pachanoi, but opinions about this are going both ways. I've read that mescaline contents depends upon the amount of sun that the Trichocereus get and also by stress. Potency is not only a matter of mescaline, but other alkaloids as well. Please post your views and findings. To those who's contributions have disappeared: please be so kind to repost them.