... Powder Plant Origin: Polygonum cuspidatum Specification: Resveratrol 20%, 50%, 80%, 98% HPLC Resveratrol is a naturally occurring phytoalexine found in ... not irradiated. 2. The raw material is 100% natural 3. Resveratrol is odorless, free from contamination & admixture. 4. The extract ... Emodin is less than 3% in mass production of 50% Resveratrol, it's lower than Industry Standard via SGS and other ...