Well, fine, they're on a website the NIH runs. I presume randos can't publish unsubstantiated junk there, so there's some level of these articles having passed through NIH's filters.
It's an index, not an endorsement. This is their disclaimer:
"This disclaimer relates to PubMed, PubMed Central (PMC), and Bookshelf. These three resources are scientific literature databases offered to the public by the U.S. National Library of Medicine (NLM). NLM is not a publisher, but rather collects, indexes, and archives scientific literature published by other organizations. The presence of any article, book, or document in these databases does not imply an endorsement of, or concurrence with, the contents by NLM, the National Institutes of Health (NIH), or the U.S. Federal Government."
The first one is published in Science Advances which is AAAS's open access journal, and they include other open access journals so, some of it will be unsubstantiated rando junk.
