Here is a beginning list of resources and ideas that can be helpful in medical activism. First, remember that you don't need to do hours and hours of research to get the information you need. Sometimes less is more. Too much research can leave you confused and intimidated. The public library is a good place to start for basic information.
Research is much easier on the web.
Almost all medical libraries are open to the public. Identify yourself and ask when the public can use the library, and what the rules are, as well as whether any training is available in doing Medline searches for medical information. Librarians usually try hard to be helpful, but don't expect them to do the searches for you. Excellent nondiet journal for health care professionals, but written in plain language. Comprehensive monthly reports on recent obesity research, especially pharmaceutical research.