Bluebonnet s Age-Less Trans-Resveratrol 500 mg Vcaps provide the active trans isomer from 4:1 red wine extract and Japanese knotweed (a more concentrated source of trans-resveratrol) that has undergone an enzymatic purification process rendering it virtually free of impure compounds commonly found in lower quality resveratrol products. Available in easy-to-swallow vegetable capsules for maximum assimilation and absorption.