Polydatin

CAS 27208-80-6

Polydatin, or trans-piceid, is resveratrol with a glucose residue attached through oxygen. The bond makes it a distinct molecule rather than two ingredients dissolved together. A study of grape juices measured both cis and trans forms of piceid and of free resveratrol. Those distinctions matter because compounds with different double-bond geometry can share a mass, while an intact glucoside and its sugar-free counterpart have different structures. Measuring free resveratrol after breaking the sugar linkage answers a different question from measuring intact polydatin. A useful report therefore identifies which form was measured and whether any conversion preceded the measurement. The result for a particular juice is a description of that sample, not a universal profile for every product made from grapes.