Researchers have discovered a blood test that can accurately predict the onset of dementia, including Alzheimer’s disease. The test detects “biomarkers” in the blood that, if found, can determine if someone will develop Alzheimer’s disease within three years.

Scientists from Georgetown University Medical Centre monitored 525 healthy participants aged 70+ over five years. They compared blood samples from 53 participants who developed dementia to “cognitively normal” people.