The reducing sugar content in kimchi was measured by Miller’s (16) colorimetry using dinitrosalicylic acid (DNS).DNS reagent was added to the dilute solution of kimchi,the mixture was stirred thoroughly, left 5 minutes for reaction, and cooled down. For the solution with developed
color, we measured absorbance at 550 nm using a spectrophotometer (V-550, Jasco Co., Tokyo, Japan) and converted the result into glucose for presentation