Described herein is a method for producing indole-3-propionic acid and other indole derivatives via bacterial fermentation and compositions of the same. The method comprises adding bacteria having a nucleic acid sequence with at least 80% homology to the nucleic acid sequence of SEQ ID NO: 1 to a liquid fermentation medium; fermenting at about 36° C. under anaerobic conditions; adding a dehydrating agent; and dehydrating to obtain a fermentate powder comprising indole-3-propionic acid and other indole derivatives.