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Summary: The production of functional foods has been on a consistent rise in the past few years. The increasing demand for these foods could play a pivotal role in addressing the escalating issue of food waste and in the creation of innovative food formulations. Utilising by‐products from the food industry has become commonplace due to their advantageous nutritional composition and functional properties. These by‐products retain richness in colour compounds, proteins, amino acids, lipids, fatty acids, sugars, fibres, minerals, vitamins, antioxidants and antimicrobial compounds. This abundance of elements can be harnessed to develop innovative food products. This review examines the potential of utilising food industry wastes for producing functional foods, focusing on residues from animal and vegetable origins; such residues find application in creating snacks, beverages, fermented foods, bakery items, dairy products, pasta, charcuterie, chocolate, flavouring agents, additives and culinary innovations. This study seeks to establish a sustainable strategy for minimising food waste disposal, fostering a bio‐based food production industry and enhancing overall sustainability by uncovering alternatives for novel, nutritious and value‐added food products. [ABSTRACT FROM AUTHOR]

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Current consumers continuously demand safer and higher quality products in the global market. Essential oils derived from plants and spices have gained importance as natural replacers of compounds of synthetic origin. They provide clean labels that satisfy consumer trends and function to mitigate one of the main mechanisms of food deterioration: lipid oxidation. This work aims to present an overview of the sources, extraction methods, and studies assessing the antioxidant capacity of essential oils, emphasizing their applications in diverse food matrices. The review focuses on studies from 2010 to present towards providing recent information on the direct addition of these natural antioxidants in oils, meat, dairy products, and other foods. [ABSTRACT FROM AUTHOR]