Polygoni multiflori radix is the root of Polygonum multiflorum Thunb. of Polygonaceae. There are many active chemical constituents in P. multiflorum, such as quinines, stilbenes, flavones, and phosphor lipids. P. multiflorum has many biological activities, includes anti- aging, hypolipidemic and anti- atherosclerosis effects. However,an increasing number of recently published studies have demonstrated the hepatoxicity of P. multiflorum, which draws attention of public. In this review, we provide a systematic comparison between P. multiflorum and related processed products in chemical constitue...