I am 45 and have had previous family members whom have passed away with Alzheimer's,all early onset(around aged 55 of diagnosis). My grandmother,her sister and my own mother. It appears to pass down through the female line and as I have 3 daughters and a granddaughter you can imagine my concern not just for myself but future lineage. I would be interested in taking part in any research that may be looking at a link. I spoke with my doctor a few years ago but he poo-pooed the idea and told me to come back when I thought I might have it,by which time it could be too late.