The Qat plant produces alkaloid stimulants and it drives 75% of Yemeni adults to chew qat leaves each afternoon for at least five hours. Yemeni people spend about one-quarter to one-third of their cash income on qat and because qat has come to mean everything in Yemeni life, some among the poorer segments of society will willingly forgo food in favor of buying qat. It also can lead to medical problems such as high blood pressure, liver problems, and yellow teeth. [More] [Less]