Yeah, I barely use general search for looking up anything health/fitness related. Either use scholar.google.com or limit search to pubmed/pubchem, etc. I'm so used to this bubble, sometimes it's really shocking what kind of BS my friends and family stumble upon when they click some of the top links/ads when I recommend them something. And lately I switched to duckduckgo as my default search engine as google got too smart with geotargeting, guesses and correcting my requests, my usual keyword kung fu doesn't work the way I expect more often than not.