High-acidity vinegar and method for producing the same

Abstract

The present invention relates to a method for producing a high-acidity vinegar with improved efficiency compared with conventional methods and a high-acidity vinegar obtained by such method. The method of the present invention is characterized in that acetic acid fermentation is conducted with a culture solution which contains a compound having a thiol group or an S-substituted derivative thereof or a compound having a disulfide bond as an additive wherein a total nitrogen content of the culture solution is 0.023 w/v % or less. According to the method of the present invention, a high-acidity vinegar, which has a total nitrogen content of 0.015 w/v % or less and an acidity of 10 to 25 w/v % and contains a compound having a thiol group or an S-substituted derivative thereof or a compound having a disulfide bond at a concentration of 17 μM or more in terms of sulfur atoms contained in the thiol group or disulfide bond can be obtained.

Dependencies are inferred from the claim text.