Phenolic profiles of cultivated, in vitro cultured and commercial samples of Melissa officinalis L. infusions

► Infusion of lemon balm is a source of phenolic compounds. ► Cultivated, in vitro cultured and commercial samples showed similar phenolic profile. ► Rosmarinic acid was the most abundant compound. ► Luteolin-3′-O-glucuronide was found in all the samples. ► Dimers, trimmers and tetramers of caffeic acid were identified for the first time.