This book on phytochemicals is designed in response to the requirement for more current research on the subject. Phytochemicals are biologically active non-nutritive compounds that occur naturally in plants. They are utilized for food and medicinal purposes. Several topics are encompassed in this book like phytochemicals and their pharmacological aspects, chemical as well as physical aspects and biological activities. This book consists of contributions made by internationally renowned authors. It is intended to satisfy the needs of health professionals, researchers, government regulatory agencies and industries. The aim of this book is to serve as a valuable source of reference for the readers who are related to this significant and rapidly advancing area of phytochemicals, and its impact on human health.