There is genetic testing through 23 and me among others. The decision to test is a highly personal one.The MJF Foundation just released significant information on bio markers that may help detect the possibility of early onset. If you go to their website you can read all the recent breakthroughs. I also just got a pamphlet from the foundation which I believe they will send you on request. There seems to be a great deal of research on early detection. Thea DeStephano Community Team Member