PROBLEM TO BE SOLVED: To provide an oil-soluble antioxidant enabling a water-soluble antioxidant component insoluble in oil-and-fat and derived from a natural product, especially catechins originated from green tea, to be transparently and homogeneously dispersed in the oil-and-fat, hardly providing bitterness and astringency peculiar to the catechin, and having excellent antioxidant effects, and to provide a method for producing the antioxidant.SOLUTION: There is provided an oil-soluble antioxidant obtained by adding an oil phase part obtained by mixing a triglyceride of a medium chain fatty acid with a condensed ricinoleic acid ester of a polyglycerol to a water phase part obtained by mixing a water-soluble antioxidant component derived from a natural product, and a fatty acid ester of a polyglycerol, having HLB of 14-16, with water, and emulsifying the resultant mixture, and having an average particle diameter of 40-120 nm transparently dispersible in oil-and-fat.COPYRIGHT: (C)2013,JPO&INPIT【課題】 油脂に不溶な天然物由来の水溶性の抗酸化成分、特に緑茶由来のカテキン類を油脂に透明に均一に分散でき、しかもカテキン特有の苦味渋味を呈することがなく、さらに抗酸化効果に優れた酸化防止剤、並びにその製造方法を提供することである。【解決手段】 天然物由来の水溶性の抗酸化成分とHLBが14~16であるポリグリセリン脂肪酸エステルと水を混合して得られる水相部に、中鎖脂肪酸トリグセリセライドとポリグリセリン縮合リシノレイン酸エステルを混合して得られる油相部を添加し乳化することによって得られ、油脂中に透明に分散可能な平均粒子径が40~120nmの油溶性酸化防止剤である。【選択図】 なし
