People take medicine for diabetes and blood pressure when levels are high...indicating that they are already borderline. You will not know if you are going to have alzheimer's. Yes, I am in agreement with for sports injuries.
Xena, thank you for all you bring to this board. Your honesty about your own challenges only makes me respect you more. There are a few here who help us newbies to AVXL, and bio-stock-manipulations / frustrations in general, stay strong and long for true science in it's infancy, but you are top of the charts. Thank you!