###### Abstract  
In recent years, the global production and industrialization of avocados has led to the generation of large numbers of peel, seeds, and leaf by-products with significant environmental implications. Current efforts, including the Sustainable Development Goals, aim towards the development of sustainable operations through the valorization of waste. Previous research has focused on studying the rich chemical composition of these avocado by-products. Current studies are working on the isolation of polyphenols, flavonoids, phenolic acids and other bioactive compounds found in avocado peel, seeds and leaves for applications in nutraceutical products in the food, pharmaceuticals and cosmetics industries. The inclusion of these extracts in industrial matrices often requires stabilization technologies such as encapsulation emulsions to ensure the delivery and bioactivity of these target compounds. This review will discuss the global production volumes of avocado and its by-products as well as the potential inclusion in various industries based on their chemical compositions. Additionally, this work addresses the various applications that have been previously proposed for the wastes and their extracts. This review also covers the stabilization techniques previously employed in avocado extract treatment, their applications, and the current challenges and opportunities associated with avocado by-products. avocado extract; bioactive compounds; agri-food byproducts; encapsulation; stabilization; agri-food waste +
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during the winter and summer seasons lead to an accumulation of residual biomass from the leaves of the avocado trees [8; 9]. Current industrial processes point towards more sustainable practices, particularly in the agro-industrial realm. Several by-products are generated by the avocado sector which could be exploited by industries in beneficial ways to contribute to the zero-waste target as well as the circular economy idea proposed in the Sustainable Development Goals (SDGs). SDGs are a collaborative effort between all countries of the United Nations that seek the reduction of poverty, elimination of hunger, and protection of the planet among other objectives. In the current 2030 agenda, the second goal focuses on food security, high nutrition and sustainable agriculture. The 9 th and 12 th goals aim to reach sustainable industrialization, consumption, and production [10]. To contribute to these collective efforts of sustainability, the appropriate management of agro-industrial residues is required. Previous studies focused on avocado byproducts have found a large variety of compounds of added value in these by-products including protein, lipids, fiber, and carbohydrates [5; 11]. Moreover, the presence of bioactive molecules such hydroxycinnamic acids, flavonoids, and proanthocyanins make avocado seeds, peel and leaves a possible source of antioxidants for industrial applications [12]. These compounds can be recovered from the avocado residues using hydroalcoholic solvents along with various extraction methods including maceration, ultrasound-assisted extraction, and microwave-assisted extraction (MAE), among others [13; 14; 15; 16]. The overall antioxidant capacity and phenolic content of the extracts depend on the extraction parameters. Previous studies have shown potential applications of the extract and by-products in the food, pharmaceutical, pigment and nutraceutical sectors [5]. The inclusion of the extract into pharmaceutical or food preparations usually requires stabilization processes that help maintain the antioxidant capacity of these compounds. Some techniques previously employed include emulsification and microencapsulation through various methods such as spray-drying, coacervation, and freeze-drying [17; 18]. This article reviews the bioactive profile of avocado extracts from their seeds, peels, and leaf waste and their potential application and stabilization methods.