Is There A Blood Test To Determine Whether I Or My Loved One Has Alzheimer's Disease?

Rudolph Tanzi answers the question: 'Is There a Blood Test for Alzheimer's?'

May 4, 2009 -- Question: Is there a blood test to determine whether I or my loved one has Alzheimer's disease?

Answer: Currently there is no blood test to determine whether one has Alzheimer's disease. A blood test can be used to do genetic testing for risk factors for Alzheimer's disease. However, these are only perfectly accurate for a very rare form of Alzheimer's that strikes early in life -- under 60 -- and usually involves familial clustering of the disease.