The study focused on the GSH in dietary supplements.DTNB method was used to determined GSH content,at the same time,the scavenging effect on superoxide radical was determined by pyrogallol method.The results indicated that DTNB method was a rapid method to test GSH in dietary supplements.The correlation analysis between scavenging effect on superoxide radical and GSH content was investigated.The results also showed that the functional activity of GSH in the dietary supplements were quiet different.