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Proteins

Grape Seed Proteins Show Promise as Sustainable Food Source

Strategic Insights

— 1 min read

Recent research from the University of Seville has made significant breakthroughs in the identification of grape seed proteins as a valuable and sustainable source of plant-based proteins. With a growing global demand for protein-rich foods, scientists have been searching for effective ways to repurpose industrial waste into usable by-products. This study highlights the potential of grape seed proteins to meet these demands while promoting a circular economy.

Key Takeaways:

  • Grape seed protein extracts (GSPEs) showed yields above 40% and contained 250-420 g/kg proteins, making them a potential source of sustainable protein.
  • The amino acid profiles of GSPEs were rich in Glu, Arg, and Asp, and poor in Met and Cys, covering the nutritional requirements for essential amino acids.
  • GSPEs exhibited considerable antioxidant activity, with phenolic contents ranging from 224-287 mg GAE/g extract, and emulsifying and foaming capacities at basic pH.
  • The techno-functional properties of GSPEs were comparable to those found in other seed protein extracts, such as Cucurbita moschata or Medicago sativa.
  • The research identified warm-climate grape seeds as a potential source of these valuable proteins, coinciding with the increasing need for sustainable food sources.
  • The Spanish Government and ERDF (European Regional Development Fund) funded this research, highlighting the importance of this project in promoting a circular economy.
  • Authors include Maria Jesus Cejudo-Bastante, Ana Belen Mora-Garrido, Francisco J. Heredia, and M. Luisa Escudero-Gilete, who collaborated on this study led by the University of Seville.

Statistics:

  • 40% yield of grape seed protein extracts (GSPEs) obtained through alkaline extraction and acid precipitation.
  • 250-420 g/kg protein content in GSPE extracts.
  • 224-287 mg GAE/g extract phenolic contents in GSPEs.
  • 728-1834 μmol TE/g extract antioxidant activity in GSPEs.
  • 92 m²/g extract maximum emulsifying capacity of GSPEs.
  • 180% foaming capacity of GSPEs at basic pH.
  • 2.0-3.0 mL/g extract water retention of GSPEs.
  • 2.0-4.6 mL/g extract oil retention of GSPEs.

Sources:

  • NewsRx. Investigators from University of Seville Target Life Science (Chemical Composition and Techno-functional Properties of Grape Seed Proteins Of Vitis Vinifera L. Grown In Warm Climates Regions). Pharma Business Week. November 3, 2025; p 92.

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