Thanks for the reference, Roxy. Some discussion of which frequencies are useful for healing which tissues is cited in my response to the "frequency specific microcurrent" thread on the Resources board of this forum.
Here's another example I use, by analogy. Visible light is medium-frequency electromagnetic energy. Gamma radiation is high-frequency electromagnetic energy. Gamma radiation is deadly. Visible light isn't. Believing that higher frequency = better, would lead one to irradiate himself with gamma rays -- which would be an incredibly stupid thing to do.
Bruce