About product and suppliers:
            227 japanese knotweed resveratrol extraction products are offered for sale by suppliers on Alibaba.com, of which herbal extract accounts for 3%. 

A wide variety of japanese knotweed resveratrol extraction options are available to you, 

There are 11 suppliers who sells japanese knotweed resveratrol extraction on Alibaba.com, mainly located in Asia. The top countries of supplier is China, from which the percentage of japanese knotweed resveratrol extraction supply is 100% respectively.