Some links on ProtocolEngine are affiliate links — meaning we may earn a commission when you purchase through them, at no extra cost to you.
Our editorial process is completely independent of affiliate relationships. Evidence grades are calculated algorithmically from published research and are never adjusted based on commercial partnerships.
ProtocolEngine runs on Premium subscriptions and, where applicable, affiliate revenue. Both support the same operation: daily research ingestion from PubMed and bioRxiv, server costs, and content production. The goal is to keep the evidence free to read, and charge only for the tools that help you act on it.