Take for example their page on Creatine. Summarizes and links 746 references. Their chart goes over "What do people claim this does" "How much of an effect does it have on that thing" "How sure are we about that"
Shear numbers is not really a good metric a paper from a renal specialist like, say the main doctor I saw for years and set up the renal unit at Lister has say a different value to some other citations/
Our HEM specifically mentions kidney function and links to studies that looked at creatine and kidney function.