Most of the conventional wisdom about late-onset Alzheimer’s disease is wrong, according to Prof. Francisco Gonzalez-Lima of the University of Texas at Austin. In this conversation with Medcan Chief Medical Officer Dr. Peter Nord, Gonzalez-Lima argues against the old hypothesis that amyloid plaques and tau tangles cause dementia in the aged. Instead, he says neurological problems arise due to the inhibition of an enzyme called cytochrome oxidase—which can be treated with infrared lasers and a substance called methylene blue.