Mosquitoes and brewer’s yeast

DEAR DR. GOTT: I used the search function at your Web site but couldn’t find the answer, so I am hoping that you can help me. A while ago, someone wrote about an herb that changes the body chemistry so that mosquitoes stop biting. What is the name of that herb?

DEAR READER: I am sorry to hear that the search results failed to help you. Just to double-check, I looked for the article and didn’t find it. This means that the article has not been entered into my archived database yet because of its age. Putting several years of past columns onto the site is a time-consuming project. However, this does not mean I don’t know the answer.
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