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We apply and quantify two techniques to incorporate carotenoids into liposomes: (i) preparation of unilamellar liposomes from mixtures of phospholipids and a carotenoid or cholesterol; (ii) insertion of carotenoids into prepared liposomes. Homogeneous liposomal fractions with a vesicle size diameter of approximately 50 nm were obtained by an extrusion method. The resulting vesicles were subjected...