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Deamidated wheat gliadin (gliadin) and its conjugates were applied to form complexes with resveratrol (Res). Res is a kind of polyphenol known for its low bioavailability and solubility in aqueous solution. The morphology of the complexes and Res stability were compared. Colloidal complexes were incorporated into emulsion to evaluate antioxidant activity. Results indicated that both gliadin and glycosylated gliadin can form nanocomplexes with Res and had high retention efficiency. Colloidal complexes solution can efficiently protect Res from UV-light transformation and the content of trans-Res was significantly improved (p < 0.05). Higher Res bioaccessibility in the complexes after digestion indicated that colloidal complexes can efficiently increase Res stability during gastrointestinal digestion. Dextran moieties were more efficient to enhance Res bioaccessibility due to steric hindrance. In the emulsion system …