Well, I'm 73 but my mom is almost 96 and has severe dementia, otherwise healthy. My dad was 94 when he died. He had Alzheimer's, with all the typical ALZ syndromes. He also did not have other diseases that would kill him, such as heart disease, nor cancer, so it was a matter of ALZ progressing to brain areas that could kill him. I don't want to live that long, but I don't want to take something that could negatively affect my brain either.