[Flaming Conservative]

think there is a precaution for one or the other of them if a person has allergies to sulfur-

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I was wondering about that; I’m allergic to sulfa. Any chemistry experts out there know?

[jimwatx]

I’m no expert (on anything) but sometimes it’s the form of sulfur that is the problem. This explains it here.

https://www.pacificcollege.edu/news/blog/2019/08/07/sulfa-sulfite-sulfate-and-sulfur-true-allergy-cross-allergy-or-no-allergy