Effects of Yoghurt-Administration on Fecal Flora and Putrefactive Metabolites of Senile Volunteers

Abstract

Nine volunteers, 5 females and 4 males, ranging from 66 to 88yr (average 80.2yr) participated in this study. Yoghurt (130g) prepared with Lactobacillus delbrueckii subsp. bulgaricus strain 2038 and Streptococcus salivarius subsp. thermophilus strain 1131 was administrated twice a day for 2 weeks. The odor of the feces was improved and the number of bifidobacteria in feces was significantly increased by the administration of yoghurt. In addition, the concentration of ammonia in feces was significantly decreased and the concentration of the other putrefactive metabolites such as p-cresol, indole and skatole were also decreased by the administration of yoghurt. The decrease in fecal pH was also found by the administration of yoghurt.