Resorcylic Acid Lactones, including zeranol, anabolics listed in the group A4 of Directive 96/23/EC, are banned in Europe for use in animals since 1985. Zeranol, after administration to animals, is metabolized to taleranol and zearalanone. It can also naturally occur in the urine due to conversion of zearalenone that may be present in animal feed. In 2010–2017, in Poland, 7746 animal samples were tested for zeranol residues within the official monitoring program. In 13, zeranol was detected after screening. Re-examinations confirmed resorcylic acid lactones in six samples. The recommendations state that only the presence of zeranol and/or taleranol gives the basis for non-compliance. Confirmation should cover the entire profile of six resorcylic acid lactones. In case of detection, the relationship ratio should be verified. Following the proposed criteria, it could be concluded that zeranol detected in urine samples in Poland originated from contamination of feed with mycotoxin, not from illegal use.

自1985年起，欧洲就禁止在动物体内使用间苯二酸内酯（包括麦角酚，合成代谢性食品的指令96/23 / EC）在动物中使用。对动物给药后，扎那醇被代谢为麦草醇和泽拉拉酮。由于可能存在于动物饲料中的玉米赤霉烯酮的转化，它也自然会在尿液中发生。在2010–2017年，在波兰的官方监测计划中，对7746种动物样品的谷氨醇残留进行了测试。筛选后检测到13中的谷醇。重新检查确认了六个样品中的间苯二酸内酯。建议指出，只有存在麦角酚和/或麦角醇才是违规的基础。确认应涵盖六种间苯二酸内酯的全部概况。如果检测到，则应验证关系比率。