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Related Experiment Video

Updated: Jun 9, 2026

Extraction and Purification of Polyphenols from Freeze-dried Berry Powder for the Treatment of Vascular Smooth Muscle Cells In Vitro

Extraction and Purification of Polyphenols from Freeze-dried Berry Powder for the Treatment of Vascular Smooth Muscle Cells In Vitro

Published on: July 5, 2017

Setting Up a "Green" Extraction Protocol for Bioactive Compounds in Buckwheat Husk.

Anna R Speranza¹, Francesca G Ghidotti¹, Alberto Barbiroli¹

¹Department of Food, Environmental and Nutritional Sciences, University of Milan, 20133 Milan, Italy.

International Journal of Molecular Sciences

|August 14, 2025

Summary

Microwave-assisted extraction (MAE) efficiently recovers polyphenols from buckwheat husk, a sustainable food and pharma ingredient. This green method enhances antioxidant and anti-inflammatory properties for diverse applications.

Keywords:

anti-inflammatory properties buckwheat husk extraction microwave-assisted extraction polyphenols ultrasound-assisted extraction

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Area of Science:

Agricultural Science
Food Science
Biochemistry

Background:

Buckwheat husk is a rich source of bioactive compounds, including polyphenols and dietary fiber.
Valorization of buckwheat husk aligns with circular economy principles for sustainable resource utilization.

Purpose of the Study:

To compare green extraction methods, specifically ultrasound-assisted extraction (UAE) and microwave-assisted extraction (MAE), for polyphenol recovery from buckwheat husk.
To evaluate the impact of MAE on the physicochemical properties of buckwheat husk and the bioactivity of the extracted polyphenols.

Main Methods:

Green extraction techniques: ultrasound-assisted extraction (UAE) and microwave-assisted extraction (MAE).
Conventional extraction using acidified methanol for comparison.
Analysis of residual husk material using Scanning Electron Microscopy (SEM), Fourier-Transform Infrared Spectroscopy (FTIR), and fiber analysis.
Assessment of antioxidant activity and modulation of inflammatory markers in human Caco-2 cells.

Main Results:

Microwave-assisted extraction (MAE) significantly improved polyphenol yield by 43.6% compared to conventional acidified methanol extraction.
MAE altered the structural and chemical properties of buckwheat husk, enhancing polyphenol accessibility.
Green extracts exhibited strong antioxidant activity and modulated inflammatory markers in Caco-2 cells.

Conclusions:

Microwave-assisted extraction (MAE) is an efficient and sustainable alternative to conventional acid- and solvent-based methods for recovering polyphenols from buckwheat husk.
Buckwheat husk extracts obtained via green methods possess significant bioactivity, suitable for food and pharmaceutical applications.
This study supports the valorization of buckwheat husk as a valuable raw material for bioactive compound recovery.