This book bridges ancient wisdom and modern innovation, exploring the multifaceted role of castor oil in health, food technology, and sustainable energy. My journey into its world began during fieldwork in arid regions, where the plant's remarkable resilience mirrored its extraordinary biochemical versatility. Drawing on insights from over 100 peer-reviewed studies (2000-2025), this work dispels myths, validates traditional applications, and highlights cutting-edge industrial advancements, such as bio-lubricants that meet ASTM standards. Whether you are a clinician, food scientist, or sustainability advocate, this guide offers practical, evidence-based knowledge while adhering to ethical and regulatory principles. It is a testament to the enduring relevance of castor oil in shaping a healthier, greener future.