The subject of the invention is a perorally applicable preparation of vegetable origin, resistant to pepsin and trypsin, based on histaminase, optionally for the use as an agent for improving digestion, reducing appetite or reducing body weight. The preparation of the invention is a pressed juice-which is optionally in lyophilized form-obtained from seedlings of pea (Pisum sativum L.), lentil (Lens culinaris), chick pea (Cicer arietinum), grass pea (Latirus sativus), bean (Phaseolus vulgaris) or field bean (Vicia faba) or-from a mixture of seedlings of the above mentioned plants-which contains histaminase, catalase and protease inhibitor. The subject as well of the invention is the production of the above preparation.
