Book excerpt: Bioactive Seaweed Substances for Functional Food Applications: Natural Ingredients for Healthy Diets presents various types of bioactive seaweed substances and introduces their applications in functional food products. Presenting summaries of the substances derived from seaweed, this book systematically explores new ingredients and the bioactive substances that are both environmentally friendly and highly beneficial to human health. This evidence-based resource offers an abundance of information on the applications of seaweed as a solution to meet an increasing global demand for sustainable food sources. It is an essential reference for anyone involved in seaweed substance research, seaweed processing, and food and health disciplines. - Discusses the use of bioactive seaweed substances as a new class of food ingredients - Outlines the use of seaweed as gelling agents used for food restructuring, coating and encapsulation - Systematically explores new ingredients and the bioactive substances that are both environmentally friendly and highly beneficial to human health