Subscribe now Health Intermittingly inhaling a high dose of carbon dioxide seems to remove the proteins amyloid and tau, which are implicated in Alzheimer's disease, from the brain by boosting its glymphatic system The approach could one day be delivered via a mask worn at homepocketlight/Getty Images Inhaling high levels of carbon dioxide intermittently for half an hour flushes proteins linked to Alzheimer’s disease out of the brain, a small study has found. Exposure to the gas changes how bloo...