1. research blogs - blogs where authors find pertinent and interesting info to share and then paste the articles together. these are very valuable if you find one where soneone has done the research on a subject you are interested in.
2. original content blog - blogs where the majority of the content is generated by the blogger him or herslef.
also research blogs should be categorized alphabetically by subject matter ie - apple cider vinegar, ozone therapy, juice fasting etc.
there are some top notch research blogs that no one ever visits because they don't know they exist. i recently found one on ac vinegar by accident that had all kinds of great info, but since its inactive no one goes there. people have done some really great work and its just not being utilized. some of these research blogs people should really know about, and right now there is no way possible that they can. they are gems laying around in a closet getting dusty.