Research Article

Oral Administration of Lactobacillus plantarum 299v Reduces Cortisol Levels in Human Saliva during Examination Induced Stress: A Randomized, Double-Blind Controlled Trial

Figure 4

Abundance of lactobacilli in log(cfu/mL) showing the median values. The asterisks () denote a significant difference () compared to the placebo group on day 14 and the test group on day 0.