There is no test doctors can use to conclusively determine whether someone will get Alzheimer's disease. "If you are in your 20s or 30s and want to know if you will get the disease, we don't have information to determine that now," said Heather Snyder, director of medical and scientific operations at the Alzheimer's Association.
One thing everyone agrees on: There are a lot of unknowns when it comes to Alzheimer's disease. "We don't know the exact cause of Alzheimer's, we have hints and some pieces of information," Snyder said. One thing that is known, if you have a first-degree relative, such as a parent or sibling, with the disease, you are at an increased risk. "But that is by no means definitive that you will get the disease," she said.


