take a look at turmeric

I have been taking a tablet a day for several months. In my research I can find no side effects and incredibly good sounding research. This page lists findings for the last couple of years.
http://www.turmeric-curcumin.com/curcumin.html

In short it is supposed to enhance memory, prevent alzheizmers, fight colon cancer, fight breast cance, fight inflamatory diseases like arthritis and rhumatoid arthritis, etc., etc. It has thousands of years of history in India, where the alzheimers rate is about 1%. Many universities are researching it now.