Miller concluded that laughter caused the brain to release endorphins, which in turn raised levels of nitrogen and oxygen in the blood, causing blood vessels to dilate and increasing blood flow.
米勒認為，這是因為笑能釋放腦中的神經傳導物質「腦內啡」，可激化血液中的氮、氧含量，導致血管擴張、增進血液循環。