<i>Melissa officinalis</i> L. (Lemon Balm): An Integrative Review of Phytochemistry and Evidence from Preclinical Research to Clinical Studies.

Baseline PSQI scores were comparable between groups, but the intervention group showed significantly greater improvements thereafter, with mean PSQI decreasing to 8.60 ± 2.28 at week 1 and 5.20 ± 1.87 at week 2, compared with 11.08 ± 2.73 and 10.68 ± 2.88 in controls at the same time points, respectively, indicating a marked, time-dependent improvement in subjective sleep quality with between-group differences reported as highly significant ( p < 0.001) [ 134 ].

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