Abstract: Capsules or microcapsules comprising: a) a nucleus containing seminal material or the spermatozoa of animal species chosen from the group consisting of equids, buffalo, ovicaprids, canids, felids, lagomorphs, laboratory animal species chosen from mice and rats, and possibly man, b) a membrane of a bivalent or trivalent metal alginate.

Abstract: The present invention relates to gastroresistant and enterosoluble microparticulate systems for the encapsulation of biologically active substances selected from: flavonoids, vitamins, antioxidants, immunostimulants, starchy and non-starchy polysaccharides, probiotics, prebiotics, intestinal trophism regulators, oligoelements, enzymes and bioactive peptides. Such microparticulate systems allow the administration of the aforementioned nutraceutic substances to animals such as porcines, bovines, caprines, ovines, equids, canids, felines, camelids, lagomorphs, rodents, fowl, and other mammals, including humans, fish and crustaceans, increasing the bioavailability.