A randomized, two-regimen, placebo-controlled, parallel- design is used in this study in which each subject will receive Umooze or placebo. The add- on study product will be administered twice daily for 56 days. Benefit will be evaluated at baseline and subsequently on the study day 28, 42, and 56, such as IPSS index, QoL index, Qmax, PVR, prostate volume and Prostate-specific antigen(PSA).