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<p>The study aimed to study the physicochemical and biological attributes of pomegranate peel powder and two encapsulated formulations: oil-free encapsulated powder (OFEP) and powder encapsulated with oil (PEO). To this end, both formulation were analysed for their total polyphenol content (TPC) and their in vitro antioxidant, antibacterial, and α-amylase inhibitory activities. The aqueous extract exhibited the highest TPC (47&#xa0;mg ellagic acid equivalents/ per 400&#xa0;mg of extract) and strongest DPPH/ABTS radical scavenging activity (127.11 and 225.8&#xa0;mg Trolox equivalents/ per 400&#xa0;mg of extract, respectively), whereas the encapsulated powders showed superior FRAP values (60.1&#xa0;mg and 41.1&#xa0;mg Trolox equivalents/capsule PEO and OFEP, respectively), indicating that antioxidant potential is partially preserved during encapsulation. The α-amylase inhibition of was OFEP (IC<sub>50</sub> = 27&#xa0;µg/mL) was significantly (<i>p</i> &lt; 0.05) higher than PEO (IC<sub>50</sub> = 120&#xa0;µg/mL) and the aqueous extract (IC<sub>50</sub> = 247&#xa0;µg/mL). Both encapsulated formulations exhibited notable antibacterial activity, particularly against <i>Pseudomonas aeruginosa</i>, comparable to Gentamicin. Collectively, these findings suggest that direct encapsulation of pomegranate peel powder may support its nutraceutical potential, offering a practical and sustainable strategy for functional dietary supplement development.</p> Graphical abstract <p></p>

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Physicochemical and bioactive evaluation of encapsulated pomegranate peel powder as a functional dietary supplement

  • 期刊论文

  • 发表日期：

    2025年12月5日

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  • Nedra Bennour,
  • Yassine M’Rabet,
  • Abir Soltani,
  • Emna Habibi,
  • Samira Bejaoui,
  • Hedia Chaabane,
  • Wael Mohsni,
  • Karim Hosni,
  • Hela Mahmoudi

摘要

The study aimed to study the physicochemical and biological attributes of pomegranate peel powder and two encapsulated formulations: oil-free encapsulated powder (OFEP) and powder encapsulated with oil (PEO). To this end, both formulation were analysed for their total polyphenol content (TPC) and their in vitro antioxidant, antibacterial, and α-amylase inhibitory activities. The aqueous extract exhibited the highest TPC (47 mg ellagic acid equivalents/ per 400 mg of extract) and strongest DPPH/ABTS radical scavenging activity (127.11 and 225.8 mg Trolox equivalents/ per 400 mg of extract, respectively), whereas the encapsulated powders showed superior FRAP values (60.1 mg and 41.1 mg Trolox equivalents/capsule PEO and OFEP, respectively), indicating that antioxidant potential is partially preserved during encapsulation. The α-amylase inhibition of was OFEP (IC50 = 27 µg/mL) was significantly (p < 0.05) higher than PEO (IC50 = 120 µg/mL) and the aqueous extract (IC50 = 247 µg/mL). Both encapsulated formulations exhibited notable antibacterial activity, particularly against Pseudomonas aeruginosa, comparable to Gentamicin. Collectively, these findings suggest that direct encapsulation of pomegranate peel powder may support its nutraceutical potential, offering a practical and sustainable strategy for functional dietary supplement development.

Graphical abstract