Other natural ingredients in the products are Aloe (Aloe barbadensis), Milk Thistle (Silybum marianum), Licorice (Glycyrrhiza glabra), Soybean (Glycine max) and Rosehips (Rosa canina).
They are polyphagous in herbaceous plants, mainly feeding on Carduus nutans (hence the specific name) and Silybum marianum, as well as on Salvia, Urtica and Cirsium species.
Iberogast is a mixture of extracts from bitter candytuft (Iberis amara), angelica root (Angelicae radix), milk thistle fruit (Silybi mariani fructus), celandine herb (Chelidonii herba), caraway fruit (Carvi fructus), liquorice root (Liquiritiae radix), peppermint herb (Menthae piperitae folium), balm leaf (Melissae folium) and chamomile flower (Matricariae flos).
The Gessner garden shows 50 medicinal plants (herbs and shrubs), used by 16th century's healers, each with a citation of a healer from that period, such as Cynara cardunculus, Potentilla erecta, Linum usitatissimum, Paeonia officinalis, Silybum marianum, Juniperus communis, Fragaria vesca, Artemisia absinthium and more.