ProofDigest and the Evidence Ladder

Field notes

ProofDigest reports having read 4,693 PubMed publications and selecting 1,200 studies for its archive across five topics. Its five-level ladder separates laboratory and animal findings from small human studies, large controlled trials, and repeated evidence. Example entries include 53 studies on hormone therapy, 26 on minoxidil for women, and 14 on microneedling. The homepage says free readers can see study metadata, evidence levels, conclusions, funding information, and links to the original publications.