My thoughts on the information provided
-for the amount of inflammation that is occurring 6000iu may not be enough Vit D3. I would consider going higher, up to 10,000iu for a couple of weeks at least
- it can take a minimum of 8 weeks of high doses of Magnesium to correct deficiencies how long have you been taking those amounts? (and it may take 12 weeks or so while the high levels of inflammation are still occurring)
- it can take 6 months for gluten antibodies to leave your system, the D will reduce once ALL major triggers are eliminated.
as for your bread it does have some suspect ingredients Xanthum gum, Tapioca, Olive Oil,
Yes in MC world Gluten is a big issue, albeit for many things like Soy can be just as bad. In early days, any item with more than 5 ingredients should be avoided...
There are some here that chronic histamine/mast cell issues need more than over the counter anti-histamines. There are specialists/solutions for this. and medications more specific for Mast Cell issues.
be prepared - a bit like MC there is no quick fix, guaranteed solution for Mast Cell issues. Wellness is attained by minimising as many triggers as possible along with the medications, and the medications can take a while to provide benefit.
The Mast Cell section of this forum has good information
This site provides a good summary that there is different treatment depending on the type of mast cell issue
http://www.evilmastcells.com/MCAD-Treatments.html
Of note it does mention the impact of magnesium deficiency
the tricky part as you will see from the article is that there are multiple types of mast cell activation disorders, and each of them have a different solution.
One item not mentioned on the site, that has helped a few is Methionine
Based on what you have said so far, I am not sure that MC is your main issue, I think the MC is symptom of histamine intolerance /mast cellL-methionine is also responsible for the reduction of the level of histamine in the blood, which is why it can positively affect the symptoms of allergies. In addition, it is important for the regulation of the acid-base balance and provides sulphur atoms for various chemical processes.
And in line with this, that maybe external triggers, ie pollen, and other enviro elements are more of an issue than food ingredients (albeit inflammatory foods do make it worse)
hence why you were better when on holidays.
Have you checked your home for mold?
are you drinking filtered water?
have you cleaned the filters of vacuum cleaners, air conditioners etc?
do you wear gloves when handling any cleaning products?
do you use dust mite spray/wash for sheets/towels etc
I would visit some of the allergy sites and do some reading on these types of triggers...
if it was me; for now i would limit the intake of the bread, leave the diet as is, increase the Vit D3, keep up high doses of magnesium.
Do a mega investigation of your home environment looking for histamine/allergy triggers