Chitosan is a deacetylated form of chitin and increasingly important amino-polysaccharide used in many various sectors including agriculture, food, and biomedicine. However, chitosan from marine sources has several adverse effects, including allergenic components harmful to human health. Furthermore, marine resources are seasonal, and availability is limited due to dependency on environmental conditions and climate change. In addition, shell infection in crustaceans and environmental contamination make the harvesting of chitin and chitosan problematic. In recent years, chitosan from terrestrial insects has attracted considerable interest. The discoveries show insect chitosan is more advantageous compared to crustacean chitosan. In addition, we were unable to find any literature about the adverse effects of insect chitosan thus far. This review aims to reveal information regarding crustacean and terrestrial insect chitosan and recent advances in chitosan sources. Applications from specific insect orders and perspectives for further study will also be highlighted, including medical and sensing applications.

壳聚糖是甲壳素的脱乙酰形式，是越来越重要的氨基多糖，用于农业、食品和生物医学等诸多领域。然而，海洋来源的壳聚糖具有多种不利影响，包括对人体健康有害的致敏成分。此外，海洋资源是季节性的，并且由于依赖环境条件和气候变化而有限。此外，甲壳类动物的壳感染和环境污染使几丁质和壳聚糖的收获成为问题。近年来，来自陆生昆虫的壳聚糖引起了相当大的兴趣。研究结果表明，昆虫壳聚糖比甲壳类壳聚糖更具优势。此外，到目前为止，我们无法找到任何关于昆虫壳聚糖不良影响的文献。本综述旨在揭示有关甲壳类和陆生昆虫壳聚糖的信息以及壳聚糖来源的最新进展。还将强调从特定昆虫命令和角度进行进一步研究的应用，包括医学和传感应用。