Extract of dragon fruit flower, method for preparing the same, use thereof, and skin complexion improved composition thereof

A method for preparing an extract of a dragon fruit flower, comprising:

• providing the dragon fruit flower;
• drying the dragon fruit flower, and then cutting the dragon fruit flower into chips after drying so as to obtain a plurality of dragon fruit flower pieces;
• performing an extraction process, wherein the extraction process comprises:
• providing a mixing step, wherein an alcohol solution is mixed with the dragon fruit flower pieces so as to form a mixture, and the alcohol solution is a glycerol solution;
• providing a heating step, wherein the mixture is heated up to a heating temperature and then is reacted for a heating time;
• providing a cooling step, wherein the mixture is cooled down to a room temperature and then is rested for a cooling time;
• providing a reheating step, wherein the mixture is heated up to a reheating temperature and then is reacted for a reheating time;
• and
• providing an extracting step, wherein the mixture is cooled down to the room temperature and then is stirred and reacted for an extracting time, and
• removing a solid component from the mixture so as to obtain an extract liquid, wherein the extract liquid comprises the extract of the dragon fruit flower.