pretty nice one, I like it and it seems to be quite good written in content. Unfortunately, i dislike a little the lack of apparent hierarchy. Otherwize, this is a nice site
The image that you have in the slideshow and the one for Alzheimer's disease are too stretched out, which doesn't look professional. You should just resize the images instead of stretching.
I like the site. I think its a good niche and that you will do well. The Adsense ads are colored perfectly to blend in.