When you're looking for websites to use in academic research, it's good to run it through the CRAAP test.
Remember the CRAAP test
Currency Is the content current? When was it published? For medical information, it's important that you're looking at the most up to date content.
Relevance Is the content relevant to your topic? Does it help address the issues you're writing about in your paper?
Authority Is the author of the content authoritative? What is their educational/professional background as it relates to the topic of your paper?
Accuracy Are the arguments and assertions made by the author backed up by references? Are the references high in quality?
Purpose What is the intended purpose of the site? How are they monetized? Does the author/organization have an agenda or bias?
Check out the full list of questions you should be asking of your website at the CRAAP test page from CSU Chico.
General Health Sites:
Health Demographics & Data: