The greater stability of hybrid microparticles of vaterite with fucoidan and lactoferrin in acidic environments and the prolonged release of fucoidan and lactoferrin under conditions modeling the human small intestine, as well as the preservation of the mucoadhesive properties of the microparticles, indicate the prospects for their use in oral delivery, including in the treatment of inflammatory bowel diseases [68]. This evidence concerns the gene LTF and inflammatory bowel disease.