Express.co.uk | Drug to beat Alzheimer's: Experts find out how to 'switch off' the cruel disease Express.co.uk The study found that in Alzheimer's certain immune cells that protect the brain begin to abnormally consume an important nutrient called arginine. Using a drug to block the process prevented memory loss and it is now hoped it could be trialled on humans. Alzheimer's breakthrough: Scientists may have found potential cause of the ... Hope for Alzheimer's disease,dementia – Researchers discover potential cause ... Alzheimer's Disease could be prevented by immune system tweak |