PROBLEM TO BE SOLVED: To provide a method for efficiently performing lycopene cis-isomerization under the presence of photosensitizer.SOLUTION: In one embodiment, a lycopene cis-isomerization method is provided in which a lycopene solution obtained by dissolving a lycopene and one or more photosensitizer selected from a group consisting of Erythrosin B and Rose Bengal into a solvent comprising ethyl acetate or hexane, is irradiated with light within the range of wave length that can be absorbed by the photosensitizer. In another embodiment, a lycopene cis-isomerization method is provided as an alternative to the above lycopene cis-isomerization method, in which the irradiation duration time is 5 minutes to 3 hours. In further another embodiment, a lycopene cis-isomerization method is provided as an alternative to any one of the above lycopene cis-isomerization methods, in which the lycopene solution is a solution obtained by dissolving an oleoresin prepared from fruits and vegetables into the solvent. A method for producing food and beverage is provided in which the lycopene that is cis-isomerized by any one of the above lycopene cis-isomerization methods is used as a raw material, and a method for producing cosmetic is also provided in which the lycopene that is cis-isomerized by any one of the above lycopene cis-isomerization methods is used as a raw material.COPYRIGHT: (C)2015,JPO&INPIT【課題】リコピンを光増感剤の存在下で、効率よくシス異性化する方法の提供。【解決手段】リコピンと、エリトロシンB及びローズベンガルからなる群より選択される1種以上の光増感剤とを、酢酸エチル又はヘキサンからなる溶媒に溶解させたリコピン溶液に、前記光増感剤が吸収し得る波長範囲内の光を照射することを特徴とする、リコピンのシス異性化方法;照射時間が5分間~3時間である、前記記載のリコピンのシス異性化方法;前記リコピン溶液が、青果物から調製されたオレオレジンを前記溶媒に溶解させた溶液である、前記いずれか記載のリコピンのシス異性化方法;前記いずれか記載のリコピンのシス異性化方法によりシス異性化されたリコピンを原料とすることを特徴とする、飲食品の製造方法;前記いずれか記載のリコピンのシス異性化方法によりシス異性化されたリコピンを原料とすることを特徴とする、化粧品の製造方法。【選択図】なし
