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Jholl (Louisville, Kentucky) on 03/28/2012:
I went canoeing with a friend on a river. We were attacked by these black flies. They bit her numerous times and completely stayed away from me. I had been taking probably 5-6 tablets of brewer's yeast tablets for about a week prior to the trip. I later learned they are a great source of b vitamins. In any case, I felt very bad for my friend. But, it sure worked for me. I do not know how well it works for other insects. I have been told it puts off an odor that insects detest.
