This book is crafted to make learning of biochemistry meaningful, logical, and engaging. It adopts a reasoning-based approach that helps learners understand not just what occurs in the body, but why it occurs. Complex biochemical concepts are clarified through structured explanations, clear diagrams, and flowcharts that link molecular mechanisms to their clinical significance. The book aims to encourage critical thinking, integration of knowledge across disciplines, and application of biochemical principles to real-life clinical scenarios. Serving as both a comprehensive study guide and a quick revision aid, it supports long term conceptual understanding, making it an ideal resource for undergraduate and postgraduate students alike. Salient features of the book :- ?? Fully aligned with the latest NMC competency-based medical curriculum. ?? Concept-based learning emphasizing reasoning and clinical application.