Upcycling: The Future is Now

The modern food system is under increasing pressure to meet global nutritional needs while minimizing its environmental footprint. Food waste remains a significant challenge, with nearly 40% of global food production lost or wasted annually (ReFED Insights 2023). One of the most promising solutions emerging within sustainable food systems is upcycled foods and ingredients—products and materials derived from food that would otherwise be wasted but are instead elevated and transformed into new, nutritious offerings. Upcycling not only reduces food waste but also offers a chance to enhance nutrition accessibility, support circular economies, and provide sustainable solutions to food insecurity.

Upcycled Ingredient Discovery

The transformation of food waste into high-value ingredients is made possible by advances in processing technologies, which extract, preserve, and enhance the functionality of food components. One of the most promising techniques is hydrothermal processing, which uses high temperatures and pressure to break down tough plant fibers and extract essential nutrients. This method is particularly effective for fruit and vegetable peels, which are often discarded despite being rich in polyphenols and dietary fiber. Fermentation is another valuable method, used to enhance the nutritional profile and bioavailability of upcycled ingredients. Fermented byproducts—such as fermented soy waste or spent grains—not only improve taste and digestibility but are also enablers to the introduction of beneficial probiotics and postbiotics into the food supply.

Enzymatic hydrolysis, used to break down proteins and starches into bioactive peptides, has also emerged as a key processing technique within the upcycling field. This route has proven to be particularly valuable for recovering proteins from a diverse range of substrates, including oilseed cakes, dairy residues, and even seafood waste, creating highly functional ingredients that can be used in plant-based proteins and sports nutrition products. One study went one step further and developed optimized enzyme-assisted extraction (EAE) techniques to enhance lycopene recovery from industrial tomato waste, improving efficiency while maintaining bioactivity (Catalkaya et al. 2019). The use of enzymatic pretreatment increased lycopene yield while reducing reliance on harsh solvents, making the process environmentally sustainable.

Moreover, using upcycled brewers’ spent grain (BSG)—a major byproduct of the beer industry—in targeted bioprocessing has been shown to not only increase the digestibility of BSG but also enhance its antioxidant potential, improving the bioavailability of fibers, proteins, and polyphenols, making it a viable ingredient for functional foods and nutraceutical applications (Moirangthem et al. 2024).

All of this work demonstrates that by leveraging circular economy principles, upcycling aligns with global food sustainability goals, offering an eco-friendly alternative to food waste disposal while promoting valorization. While the current research clearly highlights promising nutritional improvements, further studies are required to evaluate the most resource-efficient route to upcycling food. This will include conducting comparative life cycle assessments that are crucial to quantifying energy use, emissions, and resource efficiency across methods like fermentation, enzymatic hydrolysis, and hydrothermal processing.

Nutrient retention assessments will also help to compare the nutritional integrity of processed products, ensuring the preservation of value in upcycled outputs. In addition, optimization of waste-to-resource ratios is critical, focusing on maximizing the conversion of waste into usable products while minimizing loss, and process simulations should be conducted to model scalability, efficiency, and environmental impact of emerging methods, ensuring practicality in real-world applications.

Treasure Trove

Upcycling unearths nutritional ingredients and bioactive “treasure.” As the field of upcycling evolves, new sources of waste streams are being explored for their potential nutritional and functional benefits. Recent discoveries have identified several previously overlooked materials that could become valuable additions to the food industry.

One of the most intriguing areas of research is defatted melon seed waste, a byproduct of melon oil production. Traditionally discarded, this material has been found to be rich in proteins and essential amino acids, making it a promising candidate for plant-based protein supplements. Similarly, researchers have successfully converted industrial peach waste into sustainable cellulose fibers, which not only have applications in the food industry but also in the production of biodegradable packaging materials.

Even food waste streams once considered impossible to repurpose—such as mushroom stems, seaweed residues, and spent coffee grounds—are now being transformed into high-value food additives. These materials are being used to enhance texture, increase fiber content, and introduce bioactive compounds into novel food products (O’Connor et al. 2023). In a 2025 study, researchers demonstrated how olive leaf extract, a byproduct of olive oil production, has potential as a functional food ingredient due to its richness in oleuropein and hydroxytyrosol, both of which are powerful antioxidants with anti-inflammatory, cardioprotective, and neuroprotective properties, supporting overall health and longevity. Furthermore, their work identified innovative (and possibly more sustainable) processing methods such as supercritical fluid extraction coupled with enzymatic hydrolysis, which maximized the recovery of the ingredients while minimizing energy use and emissions (Krzywonos et al. 2025).

The upcycling of food waste into compounds with therapeutic potential is gaining increasing attention in sustainable biomedical research. Other research has explored the extraction of bioactives from plant-based and animal-based food waste, identifying key substrates that offer antioxidant, anti-inflammatory, and antimicrobial properties essential for wound healing applications (Dikmetas et al. 2024). Tomato byproducts have been highlighted for their high lycopene and polyphenol content, which exhibit strong antioxidant activity, reducing oxidative stress and promoting tissue regeneration.

Additionally, fruits and vegetables were investigated for their rich flavonoid and phenolic content, known to accelerate wound healing through anti-inflammatory mechanisms. These compounds contributed to cell proliferation, collagen synthesis, and infection prevention, making them valuable for both pharmaceutical and cosmetic formulations. Fish skin and bones served as sources of collagen and peptides, both of which enhanced tissue repair, hydration, and elasticity—critical factors in wound healing. Moreover, shellfish waste, particularly from shrimp and crab shells, provided chitosan, a bioactive with antimicrobial properties that supports infection control and barrier protection in wound care applications.

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Beyond food-waste-to-food-product-circularity, food waste reutilization is expanding across multiple categories. For example, corn plant leftovers have recently been used to cultivate yeast biomass, which serves as a sustainable protein source for animal feed. This approach not only upcycles agricultural waste but also provides a nutrient-dense alternative to traditional pet food ingredients. Citrus peels, particularly orange and lemon peels, have been incorporated into biodegradable food packaging materials. These peels, rich in pectin and essential oils, are combined with chitosan derived from shrimp shells to create fully bio-based and biodegradable films. Pineapple leaves have been successfully upcycled into an alternative to animal leather, often referred to as Piñatex. This vegan leather is derived from the leaf fibers, which are processed into a strong, flexible material used in fashion, furniture, and automotive upholstery. And banana skins are being transformed into sustainable textiles for clothing, upholstery, and industrial fabrics. The fibers extracted from banana skins possess high tensile strength, making them a viable alternative to synthetic fibers.

Challenges and Opportunities

Despite remarkable advancements in processing technologies and the utilization of novel waste streams, the adoption of upcycled foods and ingredients still faces several challenges. One significant hurdle is the stigma surrounding food waste. While consumer interest in sustainable food choices continues to grow, newer research highlights a psychological barrier in consumer acceptance of “waste-derived” ingredients. A 2020 study emphasizes this challenge, revealing that while consumers recognize the sustainability benefits of upcycled foods, they remain unwilling to pay a premium unless clear additional value, such as superior taste or enhanced nutrition, is demonstrated (Bhatt et al. 2020). This underscores the need for strategic branding and certification to position upcycled products as premium, desirable, and beneficial. Bhatt’s subsequent work emphasizes the power of certifications and standardized labeling in building consumer trust and driving purchasing behavior (Bhatt et al. 2021).

Certifications like the Upcycled Certified program, led by the Upcycled Food Association (UFA) in partnership with Where Food Comes From, have been pivotal. Launched globally in 2020, this program provides a unified framework for validating upcycled products, ensuring they meet stringent sustainability and safety standards. Currently undergoing a 2.0 evolution, the standards aim to incorporate multiple product categories, setting the stage for further expansion starting in 2025. Such initiatives play a crucial role in addressing consumer skepticism and ensuring transparency across the supply chain.

Another critical barrier is cost—both to companies and consumers. For companies, the expense of sourcing consistent waste streams, developing innovative processing technologies, and navigating complex regulatory landscapes adds significant financial pressure. For consumers, the premium pricing of many upcycled products, often necessitated by these higher production costs, limits accessibility.

To address these barriers, it is imperative to reevaluate how food systems are designed and operate. Stakeholders must move beyond traditional, extractive food systems to create circular, sustainable models that reduce costs, improve resource efficiency, and prioritize food security. To mitigate cost-related risks, stakeholders must collaborate on reimagining food system design. This involves including policymakers, manufacturers, retailers, and nongovernmental organizations at the table to co-create solutions that are sustainable, circular, and equitable. Alternative models, such as policy incentives for upcycled food production, subsidies for sustainable technologies, and initiatives to reduce food insecurity, can help reduce costs for both producers and consumers.

The Upside of Upcycling

Despite these challenges, the global upcycled foods market is projected to grow at a compound annual growth rate of 6.2%, reaching an estimated $97 billion by 2031 (Allied Marketing Research 2023). This growth is driven by increasing consumer demand for sustainable products, as well as regulatory and corporate initiatives promoting the circular food economy. North America dominates the market but there is high growth potential in Europe and the Asia-Pacific region. The market for upcycled food products is growing in Europe in part due to several European policies and initiatives driving food waste reduction. The European Union has set a bold target of reducing food waste by 50% by 2030 and several countries, most notably the United Kingdom and France, have developed national food waste reduction strategies. In Asia Pacific, there is a sizable and expanding food sector, which has encouraged the creation of numerous upcycled food products and businesses.

The evidence is clear: Upcycling is a compelling business opportunity. By uncovering hidden value in discarded or overlooked materials, companies can unlock new revenue streams while aligning with health and sustainability priorities. Upcycled foods and ingredients embody the intersection of nutrition, sustainability, and innovation, fostering opportunities for alliances that accelerate the development of a sustainable, circular food system. Far from being a passing trend, embracing upcycling is an essential step toward creating a resilient, equitable, and just food system for the future. Upcycling is a necessary transformation in the way we approach food production and consumption. The question is no longer if upcycled food will reshape our food systems, but how fast we can make it happen.ft