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Article

Traditional Decoction and PUAE Aqueous Extracts of Pomegranate Peels as Potential Low-Cost Anti-Tyrosinase Ingredients

Department of Pharmacy, University of Genoa, Viale Cembrano 4, 16148 Genoa, Italy
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Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(8), 2795; https://doi.org/10.3390/app10082795
Received: 21 March 2020 / Revised: 10 April 2020 / Accepted: 14 April 2020 / Published: 17 April 2020
(This article belongs to the Special Issue Functional Foods and Food Supplements)
The aim of the study is to evaluate the anti-tyrosinase activity of different aqueous extracts obtained from pomegranate juice processing by-products. External pomegranate peels of two certified cultivars (Akko and Wonderful), were extracted using only water as the extraction solvent. A traditional decoction and a pulsed ultrasound-assisted extraction (PUAE), both 10 min long, were performed and compared. All the aqueous extracts proved to be rich in bioactive compounds. In particular, the total phenolic content (TPC) ranged from 148 to 237 mg gallic acid equivalent (GAE)/g of dried peels (DW), the radical-scavenging ability (RSA) ranged from 307 to 472 mg ascorbic acid equivalent (AAE)/g DW, the free ellagic acid content (EA) ranged from 49 to 94 µg/mL, and the ellagitannins (ETs) ranged from 242 to 340 µg/mL. For both cultivars, PUAE extracts had higher ET content and a lower EC50, while the decoctions had slightly higher TPC, RSA, and free EA amounts. Principal component analysis (PCA) highlighted the direct correlation between the ET content and the tyrosinase enzyme inhibition (lower values of EC50). These findings suggest the potential use of both these natural extracts as low-cost lightening and/or anti-browning ingredients exploitable in several formulations (e.g., cosmetics) or extemporarily usable. View Full-Text
Keywords: pomegranate peels; anti-tyrosinase activity; waste recovery; green extraction pomegranate peels; anti-tyrosinase activity; waste recovery; green extraction
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MDPI and ACS Style

Turrini, F.; Malaspina, P.; Giordani, P.; Catena, S.; Zunin, P.; Boggia, R. Traditional Decoction and PUAE Aqueous Extracts of Pomegranate Peels as Potential Low-Cost Anti-Tyrosinase Ingredients. Appl. Sci. 2020, 10, 2795. https://doi.org/10.3390/app10082795

AMA Style

Turrini F, Malaspina P, Giordani P, Catena S, Zunin P, Boggia R. Traditional Decoction and PUAE Aqueous Extracts of Pomegranate Peels as Potential Low-Cost Anti-Tyrosinase Ingredients. Applied Sciences. 2020; 10(8):2795. https://doi.org/10.3390/app10082795

Chicago/Turabian Style

Turrini, Federica, Paola Malaspina, Paolo Giordani, Silvia Catena, Paola Zunin, and Raffaella Boggia. 2020. "Traditional Decoction and PUAE Aqueous Extracts of Pomegranate Peels as Potential Low-Cost Anti-Tyrosinase Ingredients" Applied Sciences 10, no. 8: 2795. https://doi.org/10.3390/app10082795

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