Official websites use .gov A .gov website belongs to an official government organization in the United States. Secure .gov websites use HTTPS A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites. PubMed Central ® (PMC) is a free full-text archive of biomedical and life sciences journal literature at the U.S. National Institutes of Health's National Library of Medicine (NIH/NLM) About PMC Discover a digital archive of scholarly articles, spanning centuries of scientific research. Discover a digital archive of scholarly articles, spanning centuries of scientific research. User Guide Learn how to find and read articles of interest to you. Learn how to find and read articles of interest to you. Collections Browse the PMC Journal List or learn about some of PMC's unique collections. Browse the PMC Journal List or learn about some of PMC's unique collections. For Authors Navigate the PMC submission methods to comply with a funder mandate, expand access, and ensure preservation. Navigate the PMC submission methods to comply with a funder mandate, expand access, and ensure preservation. For Publishers Learn about deposit options for journals and publishers and the PMC selection process. Learn about deposit options for journals and publishers and the PMC selection process. For Developers Find tools for bulk download, text mining, and other machine analysis. Find tools for bulk download, text mining, and other machine analysis. 12.6 million articles are archived in PMC.

3035 Full Participation Journals Journals deposit the complete contents of each issue or volume. 3035 Full Participation Journals Journals deposit the complete contents of each issue or volume. 248 NIH Portfolio Journals Journals deposit all NIH-funded articles as defined by the NIH Public Access Policy. 248 NIH Portfolio Journals Journals deposit all NIH-funded articles as defined by the NIH Public Access Policy. 44 Selective Deposit Programs Publisher deposits a subset of articles from a collection of journals. 44 Selective Deposit Programs Publisher deposits a subset of articles from a collection of journals. Collections and Saved Search features added to PMC Search Since launching a modernized PMC full-text search in 2025, NCBI has been adding new search features throughout 2026 based on… Changes to PMC's Article Dataset Distribution Services Complete Changes to PMC's Article Dataset Distribution Services announced in February, are now complete. Full documentation of the up… Changes to PMC's Article Dataset Distribution Services Complete Full documentation of the updated Cloud service is available at: https://pmc.ncbi.nlm.nih.gov/tools/pmcaws/