Nawchem, I have found molybdenum very helpful. And some use germanium sesquioxide as well.
Here is a paper on molybdenum and aldehydes:
https://candidapage.com/aldehyde.shtml
And, perhaps this MCS support group would be of great help to you:
http://www.mcsfriends.org
And the Chemical Injury Information Network has good information:
https://www.ciin.org
Good info at The Chemical Sensitivity Foundation:
http://www.chemicalsensitivityfoundation.org/index.html
and, the HEAL group in Tucson, Arizona has a good newsletter.
Here is a link to support groups and resources, from the MCS Friends site:
http://www.mcsfriends.org/resources/
How did your Vitamin D protocol work out? Has it helped you?
Have you read anything by Dr. Theron G. Randolph? He was the pioneer of environmental medicine, and loved helping those with MCS. He is one of those pioneers I really would like to have met.
I hope you are doing well.