This is the same information that your doctor uses to look up medical research. It is a bit tricky to figure out how to do a good search, but once you get it down you have a wealth of current data available to you. Most of this information is very technical and not geared toward the consumer. However, a good summary is given for each journal article that matches your search, as well as additional related articles. If you want the full text article you will have to order it and a document fee will be involved.
Most consumers find that the abstract is usually enough.
If you need more advanced searching, they have a detailed help section on how to do your search. You can also use the Internet to access health and medical information in the news. In the past, we had to go to a library and finger through stacks of printed material. These days, we can hear an interesting health and medical finding on the evening news and, minutes later, print out the actual research study from the Internet. It's truly amazing.