Allvent® It contains an extract from the root of Astragalus Membranaceus (Lectranal® ), calcium and vitamin C. Food for special medical purposes (Balanced diet). For diet management in seasonal allergic rhinitis, e.g. hay fever. Due to the Increased needs In the special area of application, calcium and vitamin C are increased. The composition of Allvent® is for the special need for needs in patients with seasonal Allergic rhinitis coordinated so that it compensates for the disturbed immune response. This is documented by clinical data.