“…Studies were excluded if the plant extract tested consisted mainly of macronutrients (e.g., carbohydrates, proteins, fats), conventional foodstuff (e.g., potato, rice, wheat products), or pharmaceutical medications, or if it had an addictive potential (e.g., nicotine or marihuana). We included studies investigating caffeine because there is an ongoing debate in the literature about whether caffeine has an addictive potential [40,41,42,43]. Herbal teas, when the herbal substance is monographed in Ph,Eur [44] or in an official monograph such as one issued by the Committee on Herbal Medicinal Products (HMPC) [45], were not regarded as conventional foodstuff, since they are also considered in phytotherapy as an active remedy.…”