A beverage with reduced flavor, such as a Kiki, a beverage base, a method for producing a beverage, a method for producing a beverage base, and a method for producing a beverage base, An object of the present invention is to provide a method for improving the flavor of a beverage. The beverage according to the present invention is a beverage containing cinnamaldehyde and contains 4-isopropenyltoluene. The beverage preferably has a cinnamaldehyde content of 0.100 ppm, a 4-isopropenyltoluene content of 1.1000 ppb, and an alcohol content of 1.1000 ppb. Also, the method for improving the flavor of the beverage according to the present invention is a method for improving the flavor of the beverage, which reduces the flavor of the beverage, such as a Kiki, containing cinnamaldehyde, and includes a step of allowing the beverage to contain 4-isopropenyltoluene. None

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