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>In August 2015, a 79-year-old German man and his wife ate a zucchini grown by a neighbor. The couple noted the unusually bitter taste. Shortly afterwards, they were both admitted to Heidenheim hospital, apparently with symptoms of a gastrointestinal infection. The wife, who had eaten a smaller portion, survived, while the man died. Toxicological analysis of the meal confirmed the presence of cucurbitacin. Investigators warned that gardeners should not save their own seeds, as reversion to forms containing more poisonous cucurbitacin might occur
Well shit, I'll need to be careful this year. I've been saving zucchini seeds for three years now and I had no idea this was a thing.