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    Plant-based proteins from agro-industrial waste and by-products: Towards a more circular economy
    (Elsevier, 2024) Hadidi, Milad; Aghababaei, Fatemeh; Gonzalez-Serrano, Diego J.; Goksen, Gulden; Trif, Monica; Mcclements, David Julian; Moreno, Andres
    There is a pressing need for affordable, abundant, and sustainable sources of proteins to address the rising nutrient demands of a growing global population. The food and agriculture sectors produce significant quantities of waste and by-products during the growing, harvesting, storing, transporting, and processing of raw materials. These waste and by-products can sometimes be converted into valuable protein-rich ingredients with excellent functional and nutritional attributes, thereby contributing to a more circular economy. This review critically assesses the potential for agro-industrial wastes and by-products to contribute to global protein requirements. Initially, we discuss the origins and molecular characteristics of plant proteins derived from agro-industrial waste and by-products. We then discuss the techno-functional attributes, extraction methods, and modification techniques that are applied to these plant proteins. Finally, challenges linked to the safety, allergenicity, antinutritional factors, digestibility, and sensory attributes of plant proteins derived from these sources are highlighted. The utilization of agro-industrial by-products and wastes as an economical, abundant, and sustainable protein source could contribute towards achieving the Sustainable Development Agenda's 2030 goal of a zero hunger world, as well as mitigating fluctuations in food availability and prices, which have detrimental impacts on global food security and nutrition.