antioxidants Review The Potential of Seaweeds as a Source of Functional Ingredients of Prebiotic and Antioxidant Value Andrea Gomez-Zavaglia 1 , Miguel A. Prieto Lage 2 , Cecilia Jimenez-Lopez 2 , Juan C. Mejuto 3 and Jesus Simal-Gandara 2,* 1 Center for Research and Development in Food Cryotechnology (CIDCA), CCT-CONICET La Plata, Calle 47 y 116, La Plata, Buenos Aires 1900, Argentina 2 Nutrition and Bromatology Group, Department of Analytical and Food Chemistry, Faculty of Science, University of Vigo – Ourense Campus, E32004 Ourense, Spain 3 Department of Physical Chemistry, Faculty of Science, University of Vigo – Ourense Campus, E32004 Ourense, Spain * Correspondence:
[email protected] Received: 30 June 2019; Accepted: 8 September 2019; Published: 17 September 2019 Abstract: Two thirds of the world is covered by oceans, whose upper layer is inhabited by algae. This means that there is a large extension to obtain these photoautotrophic organisms. Algae have undergone a boom in recent years, with consequent discoveries and advances in this field. Algae are not only of high ecological value but also of great economic importance. Possible applications of algae are very diverse and include anti-biofilm activity, production of biofuels, bioremediation, as fertilizer, as fish feed, as food or food ingredients, in pharmacology (since they show antioxidant or contraceptive activities), in cosmeceutical formulation, and in such other applications as filters or for obtaining minerals. In this context, algae as food can be of help to maintain or even improve human health, and there is a growing interest in new products called functional foods, which can promote such a healthy state.