@kangaSue I was diagnosed with crohns disease at first. I had all the symptoms and lessions, pain in my bowel and high calprotectine. I was a typical case, with my severe vitamin D deficiency. I had colonoscopy, my small intestine and stomach was checked too. I swallowed a capsule camera with which they videoed my whole bowel. Later they did MRI for whole bowel.
But as soon as they started to inject vitamin D 2500 micrograms every three months, my symptoms started become milder. I asked to have bigger dosage, so they gave me 2500 micrograms every second month and my bowel healed: no lesions, no vitamin D deficiency, no pain in the bowel and normal Calprotectine and also normal blood tests. So, I don't think I have chrohns disease but my doctor just says my crohns disease is dormant. I haven't had these symptoms for almost six years now unless I eat certain foods, medicines or supplements.
I am on a Failsafe elimination diet developed by Royal Prince Alfred Hospital at Sydney, avoiding salicylates, amines, glutamate and food additives. That elimination diet saved me from bowel inflammation.
It sounds weird that one would need fat from diet when one is injected with vitamin D. I mean, one needs fat to abrorb vitamin D from food (to carry it through the bowel) but injections don't have to absorb as vitamin D in them is already in a soluble form, readily be used by the liver. One doesn't need fat every day even when using oral vitamin D. But I quess it is possible.
My kidneys don't convert vitamin 3D to active form efficiently, propably due to mitochondio myopathy I have.