All plants used in the study (Salvia officinalis, Malva sylvestris, Illicium verum, Glycyrrhiza glabra, Mentha piperita,
Chamaemelum nobile, Melissa officinalis, Rhamnus Frangula, Thymus vulgaris, Plantago lanceolata, Calendula officinalis, Tilia europaea, Aloysia citrodora, Linum usitatissimum, Syzygium aromaticum, Coriandrum sativum, Cinnamomum verum, Papaver rhoeas, Aframomum, Helianthus annuus, Cuminum cyminum L., Sesamum indicum, Coffea arabica, Curcuma longa, Equisetum arvense, Hypericum perforatum, Origanum vulgare, Rosmarinus officinalis, Camellia sinensis, and Vaccinium myrtillus) were purchased from a local herbalist in La Coruna and belonged to the pharmaceutical company Soria Natural, Soria, Spain.