This was closed for lack of clarity. It seemed perfectly clear to me. I couldn't have answered it otherwise. Perhaps those not familiar with tea processing had trouble understanding it. But that doesn't, by itself, mean it's unclear. For instance, those not familiar with thermodynamics might have trouble understanding a question about that subject, irrespective of its clarity.
This was my own question. It was closed as a "personal medical question". It is (obviously, I think) not a personal medical question. Where in the question is there a solicitation for advice on medical treatment? I asked if anyone knew of compounds within a certain class (food-grade and/or not on the California Prop 65 list) that (A) would have antimicrobial activity in a certain type of product, and (B) also not yellow when exposed to UV. "A" is a biochemistry question, and "B" is a chemistry question.
A general comment: Posting here seems to be the only practical mechanism for getting closed questions reopened. I've tried the built-in mechanism, voting to reopen, and nothing more happens. It just sits there with my one vote to reopen.
Is there a "reopen" queue that people review? Even if there were, I suspect it would be the same people that voted to close, so that's not going to change anything, particularly since, when you vote to reopen, you can't explain why you voted to reopen. It's only here that you can explain why.