 Kytosan is a biodegradable, biocompatible polymer that has been used as a carrier in polymeric nanoparticles for drug delivery through various routes of administration. It has chemical functional groups that can be modified to achieve specific goals, making it a versatile polymer with a wide range of potential applications. Recent research has focused on using kytosan-based nanoparticles for non-parentral drug delivery, such as for treating cancer, gastrointestinal diseases, pulmonary diseases, drug delivery to the brain and ocular infections. These particles show low toxicity both in vitro and sun and vivo models, and are being studied further for their potential use in clinical settings. This article was authored by Nyanawar A. Mohamed, Tuwiriya T. M. Sayeda, Kishore M. Wazen and others.