Nanocrystalline Cellulose as a Dual-functional Excipient: A Sustainable Superdisintegrant and Binder for Oral Solid Dosage Forms

A multipurpose excipient with remarkable potential for oral solid-dose formulations is nanocrystalline cellulose (NCC), derived from natural cellulose sources. In place of traditional synthetic excipients, NCC provides a sustainable, biocompatible, and biodegradable super disintegrant and binder. Its large surface area, swelling capacity, and mechanical strength enable strong compaction and rapid tablet disintegration. In this study, the sources, structural features, extraction techniques, and functional aspects of NCC that are pertinent to medicinal usage are thoroughly examined. Wet and dry granulation are examined, along with the binding and disintegration mechanisms and the synergistic effects of combining it with other natural polymers. The higher efficacy and cost-effectiveness of NCC are demonstrated by comparisons with well-known excipients such as sodium starch glycolate, crospovidone, and MCC. In addition, the essay discusses environmental sustainability, scale-up feasibility, API compatibility, and formulation optimization through Quality by Design (QbD). New studies on 3D printed formulations, controlled drug release platforms, and chemically modified NCC derivatives demonstrate their growing use in precision and customized medicine. NCC's safety and regulatory profile is also covered, highlighting how prepared it is to be included in future pharmacopeia. NCC enables a paradigm shift toward safer, cleaner, and more effective drug-delivery methods and aligns with the objectives of green pharmacy due to its renewability, processability, and dual functional role.