In the USA, back when the effects of taxol were still being tested, there were already fears that the supply of Pacific yews would not meet the demand, and indeed statistics show that the demand for Pacific yew bark has risen sharply from 27,000 kg per year to 340,000 kg in 1995.
美國在實驗紫杉醇作用的階段，已開始擔心太平洋紫杉將供不應求。果然，根據統計，太平洋紫杉樹皮的需求量，曾經由每年二萬七千多公斤，激增至三十四萬公斤。