LEF.org has a nice summary about PQQ: http://www.lef.org/magazine/mag2011/...hondria_01.htm

Excerpt: "PQQ stimulates natural production of nerve growth factor (NGF)4,5 which triggers growth and branching of nerve cells.33 Nerve growth factor is vital in repairing damage caused by a stroke, by ischemia (loss of blood flow), or by an injury. In other words, PQQ shows promise in stimulating brain and nerve tissue to heal itself.34"

Isn't this what Cogane is supposed to do? I wonder how they compare?