RT Journal Article T1 By-products of agri-food industry as tannin-rich sources: a review of tannins’ biological activities and their potential for valorization A1 Fraga Corral, María A1 Otero, Paz A1 Echave Alvarez, Javier A1 García Oliveira, Paula A1 Carpena Rodríguez, María A1 Jarboui, Amira A1 Núñez Estévez, Bernabé A1 Simal Gándara, Jesús A1 Prieto Lage, Miguel Angel K1 3206 Ciencias de la Nutrición K1 3309.20 Propiedades de Los Alimentos K1 2302 Bioquímica AB During recent decades, consumers have been continuously moving towards the substitution of synthetic ingredients of the food industry by natural products, obtained from vegetal, animal or microbial sources. Additionally, a circular economy has been proposed as the most efficient production system since it allows for reducing and reutilizing different wastes. Current agriculture is responsible for producing high quantities of organic agricultural waste (e.g., discarded fruits and vegetables, peels, leaves, seeds or forestall residues), that usually ends up underutilized and accumulated, causing environmental problems. Interestingly, these agri-food by-products are potential sources of valuable bioactive molecules such as tannins. Tannins are phenolic compounds, secondary metabolites of plants widespread in terrestrial and aquatic natural environments. As they can be found in plenty of plants and herbs, they have been traditionally used for medicinal and other purposes, such as the leather industry. This fact is explained by the fact that they exert plenty of different biological activities and, thus, they entail a great potential to be used in the food, nutraceutical and pharmaceutical industry. Consequently, this review article is directed towards the description of the biological activities exerted by tannins as they could be further extracted from by-products of the agri-food industry to produce high-added-value products. PB Foods SN 23048158 YR 2021 FD 2021-01-11 LK http://hdl.handle.net/11093/2173 UL http://hdl.handle.net/11093/2173 LA eng NO Foods, 10(1): 137 (2021) NO European Union | Ref. 0377_IBERPHENOL_6_E DS Investigo RD 11-dic-2024