Not yet investigated
What we have so far
Extra copies of the TPSAB1 gene, in about one person in twenty, raising baseline tryptase for life — described only in 2016, and it explains a lot of previously unexplainable people.
This star is on the map because the show intends to take the question apart properly — the trials, how it is actually tested, whether the thing sold is the thing studied. That work is not done yet, and nothing here should be read as a conclusion. When the investigation is published it will appear on this page.