Upcycling in the potato industry is no longer a peripheral sustainability narrative or a marginal efficiency exercise. It is increasingly a structural response to rising raw material costs, tighter environmental regulation, pressure on margins, and the growing demand for functional, protein-rich, and clean-label food ingredients. Unlike conventional by-product utilization, which historically focused on low-value outlets such as animal feed or anaerobic digestion, upcycling seeks to retain or enhance molecular value by redirecting potato sidestreams into higher-value food, nutrition, and ingredient applications.

The technical foundation for this shift lies in the intrinsic biochemical richness of the potato. Beyond starch, potatoes contain proteins with favorable amino acid profiles, dietary fibers with functional water-binding properties, phenolic compounds, glycoalkaloids, and a range of bioactive molecules. For decades, many of these fractions were diluted, destroyed, or discarded during industrial processing, particularly in starch and frying operations. Advances in separation technology, membrane filtration, fermentation, and controlled thermal processing are now allowing processors to isolate and stabilize these components in commercially viable forms.

Regulatory frameworks have also matured. In both the EU and key export markets, clearer pathways now exist for approving novel ingredients derived from agricultural sidestreams, provided traceability, food safety, and processing consistency can be demonstrated. This regulatory clarity has reduced risk for processors and ingredient developers, encouraging investment in valorisation platforms that integrate directly into existing potato processing lines.

Economically, the rationale is increasingly compelling. Volatility in potato supply, driven by climate variability and disease pressure, has heightened awareness of yield losses and non-marketable fractions. At the same time, demand for alternative proteins, functional fibers, and nutraceutical ingredients continues to grow faster than traditional starch markets. Upcycling allows processors to decouple part of their value creation from primary yield alone, turning what was once a cost center into a differentiated revenue stream.

From Waste Reduction To Ingredient Strategy

In practice, successful upcycling in the potato industry requires a shift in mindset from waste reduction to ingredient strategy. Sidestreams must be characterized not merely by volume, but by composition, variability, and suitability for downstream processing. This includes understanding how agronomy, variety selection, storage conditions, and processing parameters affect the biochemical profile of peels, juices, pulp, and vegetative residues.

Food-grade upcycling places particularly high demands on consistency and safety. Potato proteins, for example, are sensitive to heat and oxidation, while phenolic compounds can impart bitterness if not properly managed. Processors pursuing human food applications must therefore integrate gentle extraction methods, rapid stabilization, and rigorous quality control into their operations. The payoff is access to ingredient markets that command significantly higher margins than bulk starch or feed applications.

This strategic orientation is increasingly visible across both research initiatives and early commercial deployments, where potato sidestreams are no longer treated as homogeneous waste, but as differentiated raw materials with specific functional roles in food systems.

Extracting High-Value Compounds From Seed Potato Shaws

One of the most striking examples of high-value upcycling is emerging from Scotland’s seed potato sector, where a cross-sector consortium is developing a commercial pathway for extracting solanesol from discarded potato shaws. Seed potato shaws, removed routinely to protect tuber quality and disease status, represent a large but historically underutilized biomass stream.

The project, involving the University of Aberdeen, the James Hutton Institute and farmer-owned cooperative Grampian Growers, focuses on recovering solanesol, a compound used as a precursor in the manufacture of coenzyme Q10 and vitamin K2. At present, solanesol is sourced predominantly from tobacco, creating both supply chain and sustainability concerns.

According to project data, Scotland’s seed potato sector generates more than 51,000 tonnes of shaws annually, with the potential to produce up to 120 tonnes of solanesol each year if extraction is scaled successfully. Innovate UK support under the Bio-based Manufacturing programme reflects recognition of the project’s relevance not only for waste reduction, but for establishing a new, agriculture-based supply chain for high-value nutraceutical inputs.

Sofia Alexiou, Project Lead at Grampian Growers, stated that the initiative “offers an opportunity to add value to agricultural by-products while addressing key challenges such as waste reduction and economic resilience,” highlighting the role of cooperative models in distributing value back to growers. Academic partners have emphasized the broader implications for sustainable sourcing and industrial competitiveness, positioning potato shaws as a credible alternative to tobacco-derived solanesol.

You can read the rest of this article in your complimentary e-copy of Issue #4 of Potato Business Digital magazine, which you can access by clicking here.