Muon, did any of the poisers monitor the condition with PTH hormone.
PTH is a major trigger for MCAS.
PTH extracts calcium from the bones, and it usually does when
low levels of vitamin D in the body.
The main role of vitamin D is to work on the absorption of calcium
from the gut into the blood.
I think that for those poisers who were helped by vitamin D, it is a matter of reducing the triggering of MCAS and
modulation of immunity.
So low vitamine D induce elevation of MC trought PTH.
PTH controls the level of calcium in the blood. Calcium is a mineral that keeps your bones and teeth healthy and strong. It's also essential for the proper functioning of your nerves, muscles, and heart. If calcium blood levels are too low, your parathyroid glands will release PTH into the blood.Jul 31, 2020
https://medlineplus.gov/lab-tests/parathyroid-hormone-pth-test/Parathyroid hormone as a stimulus to mast cell accumulation in bone
https://link.springer.com/article/10.1007/BF02017533However, levels of 25-hydroxyvitamin D3 less than 20 ng per mL (52 nmol per L) triggers a compensatory increase in parathyroid hormone (PTH) and, hence, accelerates bone resorption. This suggests that vitamin D deficiency occurs before the lower limits of traditional population-based values for PTH.Jan 1, 2005
https://www.aafp.org/afp/2005/0101/p46.html