I talked to a doctor in Seattle that claimed Alzheimer disease is caused by systemic yeast. He has done autopsies and has found it in the brain. If yeast wasn't present it turned out to be damage from a stroke which was later misdiagnosed. The metal deposits in the brain were caused by the base bulb of the brain being damaged from the yeast so the metals could not be cleansed out.
So it might work on Alzheimers. I would only give them just enough to kill the yeast as the thought of an Alzheimers patient with diarrhea doesn't sound appealing.