Compounds (citric acid derivatives) represented by formulae (1) and (2) are novel compounds that have hepatic disorder inhibitory effect, and are able to be used as hepatic disorder inhibitors and food additives. (In the formulae, R1 represents a C1-C3 alkyl group which may have a carboxyl group or a hydroxyl group and R2 represents a hydrogen atom； or alternatively, R1 and R2 may combine together to form a cyclic structure and represent a C2-C3 alkylene chain.)由以下式（1）和（2）所表示的化合物（檸檬酸衍生物）是具有肝損傷抑制效果的新型化合物，可做為肝損傷抑制劑、食品添加劑來使用。 （式中，R1表示也可以具有羧基或羥基的C1〜C3烷基，R2表示氫原子，或R1及R2也可以一起形成環狀結構，表示C2〜C3亞烷基鏈。） [化1]
