八角、茴香、桂皮和花椒都是人们常用的天然调味品。近年来分析化学研究表明,这类天然香料中含有一定量的黄樟素。黄樟素又称黄樟脑,是一种有强烈芳香气味的无色至淡黄色液体。动物实验证实,黄樟素可引起肝脏病变。不久前,美国俄亥俄大学的一个研究小组,就我国一些地区鼻咽癌发生率非常高的原因进行了研究,发现在引起鼻咽癌的多种诱因中,长期使用 Star anise, fennel, cinnamon and pepper are commonly used natural condiments. In recent years, analytical chemistry studies have shown that this type of natural spices contain a certain amount of safrole. Safrole, also known as safrole, is a colorless to light yellow liquid with a strong aroma. Animal experiments confirmed that safrole can cause liver disease. Not long ago, a research team at Ohio University in the United States conducted a study on the reasons for the very high incidence of nasopharyngeal carcinoma in some areas of our country and found that among the various causes of nasopharyngeal carcinoma, long-term use