What is it about?
This study explores how purple corn residues, left over after producing traditional beverages and natural colorants, can be transformed into valuable sources of bioactive compounds. We investigated spent corn cobs and grains, optimizing ultrasound-assisted extraction to recover phenolic compounds and flavonoids. Our findings demonstrate that these by-products retain significant amounts of valuable phytochemicals, highlighting their potential for developing functional food ingredients and natural colorants.
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Why is it important?
Purple corn processing generates large amounts of agricultural by-products that are often discarded, despite retaining valuable natural compounds. Our research demonstrates that these residues can serve as alternative sources of phenolics, flavonoids, and anthocyanins. Recovering these compounds could reduce agro-industrial waste, create opportunities for sustainable food ingredients and natural colorants, and support the circular bioeconomy by transforming discarded materials into valuable resources.
Perspectives
These findings open new opportunities for the sustainable utilization of purple corn processing residues. Future research should focus on scaling up extraction processes, improving solvent recovery, evaluating the stability and safety of the extracts, and testing their incorporation into functional foods and natural colorant formulations. Industrial validation and economic assessments will be essential to determine their commercial feasibility and support circular economy practices in the agri-food sector.
PhD Jimy Oblitas
Universidad Privada del Norte
Read the Original
This page is a summary of: Phytochemical recovery from spent purple corn residues: characterization and process optimization, Scientia Agricola, January 2026, FapUNIFESP (SciELO),
DOI: 10.1590/1678-992x-2025-0092.
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