The invention relates to the development of a select composition of plants obtained from non-domestic wild sources by means of meristems and the extracts thereof obtained using improved processes, in which said extracts and the active principles thereof generate a synergism demonstrating anti-inflammatory, antiviral nutritional supplement, immune system simulating, prostatic health promoting and supporting properties for improving quality of life with a wide range of benefits in indivuals with chronic terminal diseases caused in particular by tumours.