At a brunch many years ago my wife made a Zucchini salad. On my first taste, I stopped eating it and warned all the guests. Everyone stopped, except one friend,

At a brunch many years ago my wife made a Zucchini salad. On my first taste, I stopped eating it and warned all the guests. Everyone stopped, except one friend, who, unfortunately was somewhat OCD (but otherwise a wonderful person). Unfortunately, part of his condition is that he cannot waste anything, especially food. He insisted on eating the salad. I only found out (a) about cucurbitacins and (b) that my friend could not leave food uneaten after this incident. Had I known both things at the time, I would have taken the salad away. My friend was quite ill for about a week, including some internal bleeding. Thankfully, he recovered fully. Moral: don't let your guests do the polite thing if you realize something is not right!