A method for inhibiting xanthine oxidase and for reducing uric acid levels using a pharmaceutical composition or a food product obtained by culturing Gluconacetobacter hansenii or Acetobacter pasteurianus in a medium. Also disclosed is a pharmaceutical composition and a food product that each include a metabolite of Gluconacetobacter hansenii or Acetobacter pasteurianus for reducing uric acid levels in a subject and methods for producing the pharmaceutical composition and the food product.
