Alzheimer's disease

keep your brain active..
learn more languages.
people who converse in more than 2 languages are know to have less risk of getting alzheimer's disease

http://en.wikipedia.org/wiki/Alzheimer's_disease

http://www.alz.org/alzheimers_disease_what_is_alzheimers.asp

women

http://lifestyle.msn.com/your-life/bigger-picture/articlewow.aspx?cp-documentid=19334939&GT1=32001