Jeong Su-Jin, Kim Sunbin, Echeverria-Jaramillo Esteban, Shin Weon-Sun
Department of Food and Nutrition, College of Human Ecology, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul, 04763 Republic of Korea.
Food Sci Biotechnol. 2021 Oct 28;30(12):1509-1518. doi: 10.1007/s10068-021-00987-9. eCollection 2021 Nov.
Lutein (L) and zeaxanthin (Z), as macular pigments, are water-insoluble, chemically unstable, and have low bioaccessibilities; they are often emulsified to overcome these limitations. This study investigated the impact of various emulsifiers (ethyl lauroyl arginate (LAE); Tween 80; and sodium dodecyl sulfate (SDS)) on the physicochemical properties and in vitro digestibilities of L/Z-fortified oil-in-water emulsions. Droplet aggregation and creaming extents were dependent on the emulsifier type. The ζ-potentials of emulsions stabilized by LAE, Tween 80, and SDS were + 87, - 26, and - 95 mV, respectively. SDS-stabilized emulsion had the smallest particles, while the particle sizes for the LAE- and Tween 80-stabilized emulsions were larger and not significantly different. The rates of L/Z degradation were sensitive to the emulsifier type and to heat, not to light. The L/Z bioaccessibility was the highest for the Tween 80 emulsion. Surfactants should therefore be carefully selected to optimize L/Z physicochemical stability and bioaccessibility in emulsions.
叶黄素（L）和玉米黄质（Z）作为黄斑色素，不溶于水，化学性质不稳定，生物可及性低；它们常被乳化以克服这些局限性。本研究考察了各种乳化剂（月桂酰精氨酸乙酯（LAE）、吐温80和十二烷基硫酸钠（SDS））对L/Z强化水包油乳液的理化性质和体外消化率的影响。液滴聚集和乳析程度取决于乳化剂类型。由LAE、吐温80和SDS稳定的乳液的ζ电位分别为+87、-26和-95 mV。SDS稳定的乳液颗粒最小，而LAE和吐温80稳定的乳液颗粒较大且无显著差异。L/Z的降解速率对乳化剂类型和热敏感，对光不敏感。吐温80乳液的L/Z生物可及性最高。因此，应谨慎选择表面活性剂，以优化乳液中L/Z的理化稳定性和生物可及性。
