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Published on: September 2, 2022
Xanthan Gum-Stabilized Sunflower Oil Body Emulsions for β-Carotene Delivery: Preparation, Stability, and Digestion
Xuan Sheng1, Farah Zaaboul2, Lixia Chen1
1Engineering and Technology Center for Grain Processing of Shandong Province, Key Laboratory of Food Processing Technology and Quality Control in Shandong Province, College of Food Science and Engineering, Shandong Agricultural University, 61 Daizong Avenue, Tai'an 271018, China.
Abstract:
In this study, we investigated the encapsulation of β-carotene (β-CE) within sunflower oil body (SFOB) emulsions and examined the role of xanthan gum (XG) in enhancing stability and digestion behavior. The optimal conditions were heating at 45 °C for 15 min, ultrasonic treatment at 270 W for 20 min, and homogenization at 80 MPa, achieving encapsulation efficiency (EE) up to 92%. Furthermore, XG was incorporated to improve structural, oxidative, thermal, and digestive stability. More than 1.5% XG enhanced absolute value of zeta potential (21.3 mV to 23.7 mV), reduced particle size (6.52 μm), and prevented phase separation. XG-coated emulsions exhibited improved stability under heating and oxidative conditions. Additionally, XG enhanced protein digestibility and lipid hydrolysis, as well as the bioaccessibility of β-CE during gastrointestinal digestion. The XG coating also improved photostability under sunlight and UV exposure, with 2% XG emulsions showing the least degradation of β-CE. Moreover, the 2% XG emulsion demonstrated the highest release of free fatty acids (85.75%) and β-CE utilization (80%). These results highlight the potential of SFOB-XG emulsions for the effective delivery of lipophilic bioactives.
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