http://www.newsweek.com/psychedelics-may-physically-alter-structure-brain-972403

Psychedelic drugs are known to produce mind-altering effects, which can lead to profound changes in consciousness. But according to a study published in the journal Cell Reports, these compounds may alter the structure of the brain in a physical sense as well.

Researchers from the University of California, Davis (UCD), found that psychedelic compounds such as LSD, DMT and MDMA, can increase the number of connections between brain cells, or neurons.