Öz
Problems such as food shortages and malnutrition that may be encountered with the increasing population have prompted mankind to seek out alternative food sources. In this context, algae are not only able to provide a sustainable food supply; they also attract attention with their high nutritional content and health benefits and are considered as candidates for functional foods with these properties. It is stated that consuming foods on a daily basis into which are incorporated functional ingredients produced by algae improves health and reduces the risk of chronic disease. Algae, having been evaluated as a food for centuries in Asia, have begun to be used in almost every region of the world as both a food and a food additive or food supplement. Aside from the food industry, algae are among the essential sources that are used in many fields such as medicine, pharmaceutics, agriculture, animal nutrition, waste treatment, cosmetics, and biodiesel production. In this review, information related to the general properties and important ingredients of algae, their usage as food or in foods, and their health benefits have been summarized.