Alzheimer's disease is a devastating form of dementia that hinders brain functioning. There are several risk factors that are correlated with Alzheimer's disease. The first risk factor is that you are older; an interesting myth is that AD is not part of normal aging which many people believe. A second risk factor is if you have a close blood relative that has AD. The third major factor is if you have the gene (APOE). This allele is connected to AD. Some factors that increase your risk but have not been proven are, if you are female, have high blood pressure and have had head trauma.

There are absolutely no cures for AD which is terrible. The goal is to slow progression of AD. The only medications and therapies that are being used right now are to treat the symptoms. Such as Aricept that is used to increase hippocampus functioning so that the patient can have a better chance at remembering information. An interesting fact about Aricept (donepezil) is that it is in the running to start becoming one of the major drugs being used by college students just like Ritalin or Adderall. Aricept can increase "normal" people's memory which can be a clear advantage for taking tests. Before you go run and look for some make sure you look at the side effects. Neuroenhancements can be very dangerous if not taken properly.
http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0001767/
This is very interesting information, and as your title exclaims; I was not aware of it. My grandmother on my Mom's side actually has Alzheimer's Disease and it truly is a horrible thing. She has had it for probably a little less than ten years, she is now 89 years old. It started to get very bad roughly 3 years ago, to the point where she can't speak, eat, or do anything for herself. Every once in a while she gets out a few words that make sense or a name. I think she knows my family is familiar but doesn't know how she knows us or who we are. She might still be pretty familiar with my mom but the rest of us she just smiles at. She can also get very angry and sad at the littlest things or for no reason at all. She has her good days and bad, but I am hoping for a cure soon because it does run in my family I am likely to get it. It is very interesting to see what the brain looks like though after having AD. It makes sense why this disease can affect someone so greatly after seeing what your brain looks like from it. It's also interesting to know that college kids are starting to take Aricept, because I've never heard of that before. It makes sense, college kids are always trying to find ways or "short cuts" to get better grades or even just increase their memory. Overall, interesting topic and good information.