This book examines the synthetic approaches, properties, applications, and recyclability of bio-based superabsorbent polymers (SAP) in depth. It describes and compares bio-based SAPs with petro-based SAPs. Additionally, it explores the structure-property relationships of bio-based SAPs derived from various natural sources. The book covers current and emerging applications in health and hygiene products, agriculture, construction, and other areas. It also explores the recycling and reusing methods available for water recovery, pressure sensitive adhesives, etc. It discusses the issues behind the sharp increase in research attention, namely the prevailing research hotspots/clusters and suggestions with regard to present studies, works that have been significant and pivotal in the development of SAP research, and the current advances and future directions of research. It also presents the emerging applications of superabsorbent polymers.