Dietary Supplementation with an Extract of <i>Aloysia citrodora</i> (Lemon verbena) Improves Sleep Quality in Healthy Subjects: A Randomized Double-Blind Controlled Study.

Perceived Stress and Anxiety As shown in Table 5 , PSS total scores showed a decreasing trend over the study period, which was of greater magnitude in the experimental group (mean decrease of 9.1 points) as compared with the placebo group (mean decrease 5.8 points), although between-group differences were not statistically significant.

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