Objective: To test the effect of Undaria pinnatifida soluble dietary fiber on e nitric oxide level in hyperlipemic rats. Methods: 40 rats were divided into 4 groups (n=lO): control group, hyperlipemic model group, low dose dietary fiber-treated group (5%) and higb dose dietary fiber-treated group (10%). After treatment for 8 weeks, the content of plasma endothelin-I (ET-1) was determined. The protein expressitm tff endothelin-1 (ET-I) mRNA was measured using RT-PCR. Resuhs:Undar/a pinnatifida soluble dietary fiber treatment signif...