Compositions with antioxidant for oral administration, containing an active agent from plants, characterized in that it contains at least one active from inflorescence stem of pepper, in particular of pepper piper nigrum or piper longum, in the region of kampot, cambodia. The rods of inflorescence of pepper are dried, possibly ground, and reduced to powder and / or an extract (liquid or a dry basis) of the rods of inflorescence of pepper is prepared. The composition or a food supplement or food fortified or dietetic product containing it, is used to promote the removal, in particular by the liver, the waste of the body.
