Objective: To prepare vitamin A proliposomes and to enhance stability of vitamin A. Methods: Freeze drying method was used to prepare vitamin A proliposomes. The particle morphology,the size range,encapsulation efficiency and stability of vitamin A liposomes were studied. Results: After vitamin A proliposomes was hydrated, vitamin A liposomes with unilamellar vesicle was formed. The particles were distributed homogenously. The average particle size was 0.615 μm. The encapsulation efficiency of vitamin A wa...