On can't eat, bitter zucchini, once bitter, it proves that the cucurbitacin in the horn melon increase, can trigger the poisoning of people, in general this cucurbitacin will be produced because of the following two cases, one is such as hanging zucchini and some other plants hybridization planting, and another case is the self-protection role of the zucchini in the case of hot weather and high temperatures, will be distributed cucurbitacin to become bitter. Avoid being eaten by people. This belongs to the instinctive protection of plants, but also a reminder of human health, the world is really very wonderful.