Mistletoe (Viscum Album) products are manufactured as an extract of Mistletoe (Viscum Album) from the relevant host trees. Many manufacturers use the Mistletoe (Viscum Album) collected in both summer and winter, while others only use the plants harvested in winter. Different extraction procedures and solvents are also used. The spectra of ingredients and active substances therefore differs in each product that is on the market. The Abnoba Company uses both summer and winter Mistletoe (Viscum Album) for the manufacture of the medicinal product in order to ensure a wide spectrum of ingredients. The Mistletoe (Viscum Album) is then extracted without exposure to air according to a patented procedure so that as a result more than 75% of the plant material used is available in the drug. All essential ingredients such as lectins, viscotoxins, polysaccharides and triterpenoids (including oleanolic acid, betulinic acid) are then contained in the extract in very high quantities. This procedure also allows the formation of Mistletoe (Viscum Album) liposomes (vesicles) which are formed from the cell membranes occurring naturally in the plant cell. These structures may be imagined as very small spheres, invisible to the naked eye, which bind or incorporate the active substances and other ingredients of Mistletoe (Viscum Album). Pure Mistletoe (Viscum Album) liposomes have an effect in their own right: they are immunologically active. This should also be taken into account in the direct effect of the product on tumour growth. The good tolerability of these products is also probably due to this.