That’s a super-interesting question. Probably the best response is that this is another case of “Oops, Bob was wrong again!”.
For decades I have tried to be a counter-balance to the massive fire hose of false claims about the universal magic of PEMF. I am trying to do the right thing, but this puts me in the position of having a bias against PEMF. I realize this, and I rationalize that it is probably OK for me to have a biased opinion on the side of being too careful and conservative about any biological effects of PEMF because when I am confronted with solid repeatable data to the contrary, I will change my mind. So, I treat my bias as healthy scientific skepticism.
Recalling for those who have not heard this story yet, when I was asked to do the first consulting work for NASA-JSC on the biological effects of PEMF (called TVEMF at that time by the NASA scientist I was working with), my response was very much against the possibility that PEMF would have any beneficial biological effects. So I built all of the instruments to test it, we ran controlled experiments at NASA, we got positive results (my bias was wrong), I was not convinced, we repeated everything again, and got the same positive results again. So, the data was in favor of beneficial biological effects of PEMF, the experiment was replicable (we checked everything, repeated it and got the same results). Therefore my bias was not supported. Therefore I changed my opinion. I now had reason to believe that PEMF probably did have positive beneficial biological effects under some conditions.
Now the question was why and how. Those are the questions I have been working on for about 3 decades. But I also retain that skeptical bias. I want to see some reliable evidence before I start saying anything.
For several decades my strongest bias was probably against the possibility that PEMF could restore hair growth and health. My understanding of PEMF is imperfect, but I just did not see how it would work.
However, a company asked me last year to test whether or not ICES-PEMF would help hair growth. I met with them several times. They seemed to be good people with real domain expertise (not just marketers), so I agreed to run a test.
I did the best I could to modify ICES design details to fit the application, they ran a pilot test, and the results were remarkably good. They showed me a lot of data to suggest that the results were remarkably positive.
OK, once again, my bias against PEMF was not supported by the data. So, my opinion once again has changed. I now think that it is likely that, under proper conditions, ICES-PEMF can significantly improve hair health. Subsequent data may further support this, or it may contradict this. But we will see.
Now to your question (restated for the context of this discussion): why do I think ICES-PEMF appears to have a beneficial effect on hair growth and health?
Answer>>>
I do not know. But the data I have seen so far is that it seems to help quite significantly. I do not know if anyone knows why or how. I certainly don’t know. But in light of recent data I have changed my mind to now believe that there is good reason to consider that there is a positive biological effect on hair growth and health.