Are you getting ready to write a book?? Many other people have written entire books on this topic.
You need to focus your topic so that you can adequately (or better than adequately) address it in a research paper. What angle do you want to take on this very broad topic?
Here are some ideas regarding researching:
You may have to search and research, but once you learn some good sources and methods, you should have success. In addition to searching on the Internet, you also need to make best friends with the reference librarian(s) in your local or college library. Libraries these days subscribe to enormous research databases, and they are often more useful than Internet searches. Ask your librarian if you have access to EBSCOHost -- it has several databases within it, including a huge one for academic research and health education.
For Internet searching:
At this webpage, you can go immediately to the search sites (first three columns across the top) -- or even better you can scroll down until you see the section called HOW TO SEARCH THE INTERNET. Those are the links to start with. You'll not only learn how to come up with good search terms, but also how to evaluate the webpages you get as results. Some will be good and others will be garbage. You need to know how to tell the difference.
My favorite way to search is to go to Google's advanced search page http://www.google.com/advanced_search?hl=en and put my search words or phrases into the first or second search box (either "all the words" or "exact phrase"). Another is to start out at http://scholar.google.com. However, there many other strategies for searching you can use, and the HOW TO SEARCH THE INTERNET section will help you best.
Learning to use Google or other search engines can save you time and help you learn to find information efficiently. Here are some websites that can teach you how:
... and one to help you judge whether a particular website's information is worth your time:
Is it too broad to cover the physical and psychological aspects of anorexia in teens?
There are articles in here that are excellent -- how to narrow a topic. These articles are about narrowing a topic before writing an essay, but the same ideas apply to what you will be doing.
Let us know what you decide.