Several hybrid systems for oral delivery of a therapeutic peptide have been prepared and investigated. Poly(l-glutamic acidco-d-phenylalanine) and silica sub-microparticles, porous CaCO₃ microparticles and Lycopodium clavatum spore capsules were employed as the first level carriers included in sodium alginate granules as the second level carriers. Efficiency of the peptide encapsulation and release rate strongly depended on the nature and structure of the carriers.