PubMed, a service of the National Library of Medicine, includes over 15 million citations for biomedical articles back to the 1950’s. These citations are from MEDLINE and additional life science journals. PubMed includes links to many sites providing full text articles and other related resources.
Pubmed now offers RSS Feeds. You can set up multiple PubMed searches for RSS feeds. PubMed RSS feeds will include citations retrieved by your PubMed searches since the last time you were connected to your RSS reader.
Pubmed is the authoratative research database citing current and all past articles from well known medical journals. So if you closely follow research in a particular disease of interest, create a custom rss feed, add to live bookmarks in firefox and get daily updated research on that heath topic in indexed medical journals worldwide.