Abstract: The present invention concerns an extract from pomegranate (Punica granatum L), specifically obtained from one or more immature pomegranate fruits. This extract is obtained through an extraction process including steps a)-d) as described in the text and it may contain gallotannins, ellagitannins, ellagic acid derivatives and granatins. Pharmaceutical and nutraceutical compositions and food supplements comprising this extract fall within the scope of the present invention as well as their use in various fields, more specifically for the treatment of tumors.