Extract of plants and a process for making the same are disclosed. The extract has strong anti-viral action against both DNA and RNA-based viruses, and also against bacterial, fungal and protozoan microorganisms. Said extract essentially comprises the lipophilic compounds occurring in the family of plants, in particular, the terpenes and fatty acids thereof. The extract may additionally contain other said lipophilic compounds and the aglycons of the glycosides occurring in said family of plants. Several extraction solvents have been disclosed.
