Book excerpt: Handbook of Food and Feed From Microalgae: Production, Application, Regulation, and Sustainability is a comprehensive resource on all aspects of using microalgae in food and feed. This book covers applied processes, including the utilization of compounds found in microalgae, the development of food products with microalgae biomass in their composition, the use of microalgae in animal nutrition, and associated challenges and recent advances in this field. Written by global leading experts in microalgae, this book begins with the fundamentals of food and feed, including microalgal biodiversity, biogeography, and nutritional purposes. The book continues to describe compounds found within microalgae such as proteins, pigments, and antioxidants. It explains the process incorporation of microalgae into meat, dairy, beverage, and wheat products as well as real-world food applications in finfish aquaculture, mollusk, poultry, and pet feeding. The book concludes by discussing challenges and issues in the field, encompassing bioavailability, bio-accessibility, and how to address safety, regulatory, market, economics, and sustainability concerns. This book is a valuable resource for aquaculturists, food scientists, and advanced undergraduate and graduate students interested in microalgae as a sustainable food and feed ingredient. - Examines current data behind the food and feed production using microalgae-based processes - Analyzes and details the use of microalgae across industries and disciplines - Addresses and offers solutions to safety, market, sustainability, and economic issues