Specification : Resveratrol 20%, 50%, 95%, 98%, 99% 100% Natural GMP Kosher Free sample ... Kosher 3.FREE sample4.Polygonum Cuspidatum Extract Resveratrol 20%~99%Product Specification : 1.Resveratrol 20%, 50%, 70%, 95%, 98%, 99%2.Latin Name ... , its function is shown as its anti-oxidant characteristic mainly.Specification ItemsSpecificationsAppearance White fine powderTrans Resveratrol(by HPLC)98% or 99 ...