CAFL treatment information is compiled from many sources through trial and error... certainly it is not perfect, and any frq could have both harmful and helpful uses at the same time, depending on many factors. CAFL is fairly solid in my opinion and not likely to be a site set up for the sole purpose of disinfo... although any site may inadvertently end up reposting bad information.
I also wonder whether a single frequency in isolation can be considered "disharmonic"... perhaps in relation to certain other frq... but not standing alone. I strongly suspect that the Rockefeller foundation's move to select 440 Hz as the "lynchpin" from which all other notes pitches are defined, probably has nothing to do with that frquency in isolation. but admittedly, just my suspicion... more research is required here, at least to satisfy my own doubts.