The sustainability of any process lies in the eco-friendly and economical production of products for applications. Bio-based materials are emerging as raw materials for different products and applications. The book covers cellulose, chitosan, silk, collagen and gelatin bio-based materials. It describes their use in biomedical applications, such as orthopaedic implant, drug delivery, tissue culture, biosensor and engineering applications such as fuel cells, energy storage and packaging. It concludes with the use of bio-based materials as precursors for biorefinery, biolubricants, membranes and adsorbents.