Original sentence: Including a significant proportion of prebiotic foods in the diet has been demonstrated to support a healthy probiotic flora and may be a more effective and sustainable means of achieving the desirable health benefits promised by probiotics.Maintenance of a healthy gut flora is, however, dependent on many factors, especially the quality of food intake.This not only provides the characteristic sour taste of fermented dairy foods such as yogurt, but acts as a preservative, by lowering the pH and creating fewer opportunities for spoilage organisms to grow
Edited sentence: This not only provides the characteristic sour taste of fermented dairy foods such as yogurt, but acts as a preservative, by lowering the pH and creating less room for spoilage organisms to grow