What PubMed covers
PubMed is the U.S. National Library of Medicine's free search engine for biomedical literature. It indexes MEDLINE, PubMed Central, and NCBI Bookshelf — more than 35 million citations across medicine, nursing, veterinary medicine, and life sciences, updated daily.
If you are tracking clinical evidence, trials, reviews, or methodology papers, PubMed is the authoritative biomedical source. Relaylit searches PubMed on every digest run alongside five other databases so you never miss a relevant study because you were looking in the wrong index.