marshall's group is the only body out there interested in looking at the details on this. the research on the underlying issue is good, the protocol to address the issue is crap. I have always said that. but, you can't throw out the reseach on the underlying issue because you don't like the treatment protocol.
as far as having the imbalence of low 25D and high 1.25-d? I had it, as did a significant group of my chiropractor's other patients, who by the way, is not a doctor who believes in the marshall protocol. as far as inquiring about the issue, i can give a good prediction of how that will go. you will be told that 1.25-d levels are "variable" or "not reliable" and therefore should be ignored or some other nonsense. that is why people need to do their own homework and get tested.