Zinc deficiency - zinc tally taste test
I know a few people on here are supplementing with zinc. I found this test pretty interesting. Essentially you swish a zinc solution in your mouth and if you are zinc SUFFICIENT you will sense an immediate bitter taste. In contrast, if you are some level of zinc deficient then you will sense a taste ranging from nothing to a milder bitter taste.
Anyone tried this before?
Edit: To include criticism that the test can measure false positive or false negative depending on the testers overall taste sensitivity.