The book focuses on the applications of ion exchange resins in processes such as the separation and purification of proteins and vitamins, the selective separation of toxic metals and the separation and purification of bioactive molecules. Specific topics include drug delivery, clinical applications, water softening and sustained drug delivery. Keyword: Ion Exchange Resins, Protein Separation and Purification, Partition and Purgation of Vitamins, Toxic Heavy Metal Ions, Bioactive Molecules, Sustained Drug Release, Ion-Exchange Chromatography, Clinical Applications, Electrodialysis, Ultrasound, Water Softening.