Narrator: This is Science Today. In a recent study, estrogen was found to reduce the risk of Alzheimer's Disease in women by almost thirty percent. But Kristine Yaffe, a researcher at the University of California, San Francisco, says it's important to be cautious and wait for more randomized studies to come out.
Yaffe: That's really the best type of medicine - to weigh the evidence and to not prescribe medication until those studies are done. Some people are recommending estrogen either as a treatment for Alzheimer's Disease or to prevent. That's a personal style often some physicians take.
Narrator: Yaffe says there are downsides to taking estrogen, such as cost and increases in certain cancers.
Yaffe: The other thing I want to emphasize though is that it's a very complicated issue and that you have to remember, just cause you find a result, you have to always think about what else could explain this result. And both for intellectual reasons and also for practical health care reasons, one has to be a little cautious and not jump to conclusions.
Narrator: For Science Today, I'm Larissa Branin.