An oral composition, including the following components (A), (B), and (C): (A) 10 mass % to 20 mass % of a chlorogenic acid; (B) 0.4 mass % to 5 mass % of caffeine; and (C) 4-vinylguaiacol. A mass ratio of the component (C) to the component (B), [(C)/(B)], is 0.310.sup.4 or more and 3010.sup.4 or less.

An oral composition, including the following components (A), (B), and (C): (A) 10 mass % to 20 mass % of a chlorogenic acid; (B) 0.4 mass % to 5 mass % of caffeine; and (C) 4-vinylguaiacol. A mass ratio of the component (C) to the component (B), [(C)/(B)], is 0.310.sup.4 or more and 3010.sup.4 or less.

A method for preparing coffee concentrate is provided. The method includes: grinding coffee beans to obtain ground coffee beans, adding the ground coffee beans into water and then performing ultrasonic extraction to obtain a first mixture, and filtering the first mixture to obtain coffee extract and coffee grounds; adding the coffee grounds into ethanol solution for extraction, and then removing ethanol by vacuum concentration to obtain coffee oil; uniformly mixing the coffee oil and the coffee extract at room temperature to obtain a second mixture, and cooling and standing the second mixture to obtain a coffee oil layer and a coffee liquid layer; and concentrating the coffee liquid layer to obtain concentrated coffee liquid layer, and uniformly mixing the concentrated coffee liquid layer with the coffee oil layer to thereby obtain the coffee concentrate.

A method for preparing coffee concentrate is provided. The method includes: grinding coffee beans to obtain ground coffee beans, adding the ground coffee beans into water and then performing ultrasonic extraction to obtain a first mixture, and filtering the first mixture to obtain coffee extract and coffee grounds; adding the coffee grounds into ethanol solution for extraction, and then removing ethanol by vacuum concentration to obtain coffee oil; uniformly mixing the coffee oil and the coffee extract at room temperature to obtain a second mixture, and cooling and standing the second mixture to obtain a coffee oil layer and a coffee liquid layer; and concentrating the coffee liquid layer to obtain concentrated coffee liquid layer, and uniformly mixing the concentrated coffee liquid layer with the coffee oil layer to thereby obtain the coffee concentrate.