Upcycling Walnut Green Husk: Polyphenol-Rich Extracts from Traditional vs. Organic Crops for Spray-Dried Vegan Additive Development.

ABSTRACT: This study explores the valorization of walnut green husk, an agro-industrial by-product, through ultrasound-assisted extraction to obtain polyphenol-rich extracts with antioxidant properties. The extracts demonstrated non-cytotoxicity, regardless of the presence of pesticides, antibiotics, or the type of crop. Notably, organic walnut husk yielded higher total polyphenols and antioxidant activity, identifying 37 polyphenolic compounds compared to 22 in traditional crops. Chickpea protein was utilized as a wall material to encapsulate the extract, resulting in a sustainable, vegan antioxidant powder. Optimal results were achieved using 5% (w/v) chickpea protein and spray drying at 136 °C, yielding a light-colored powder with high antioxidant content and stability under low hum

SUBMITTER: Matiacevich S 

PROVIDER: S-EPMC12431422 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature