Functional ingredient from avocado peel: Microwave-assisted extraction, characterization and potential applications for the food industry

Jorge G Figueroa; Isabel Borrás-Linares; Raquel Del Pino-García; José Antonio Curiel; Jesús Lozano-Sánchez; Antonio Segura-Carretero

doi:10.1016/j.foodchem.2021.129300

Functional ingredient from avocado peel: Microwave-assisted extraction, characterization and potential applications for the food industry

Food Chem. 2021 Aug 1:352:129300. doi: 10.1016/j.foodchem.2021.129300. Epub 2021 Feb 15.

Authors

Jorge G Figueroa¹, Isabel Borrás-Linares², Raquel Del Pino-García³, José Antonio Curiel³, Jesús Lozano-Sánchez⁴, Antonio Segura-Carretero⁵

Affiliations

¹ Department of Analytical Chemistry, University of Granada, Avda. Fuentenueva s/n, Granada 18071, Spain; Research and Development of Functional Food Centre (CIDAF), Health Science Technological Park Avda. del Conocimiento s/n, BioRegion Building, Granada 18016, Spain; Departamento de Química y Ciencias Exactas, Universidad Técnica Particular de Loja, San Cayetano Alto s/n, Loja 11-01-608, Ecuador.
² Research and Development of Functional Food Centre (CIDAF), Health Science Technological Park Avda. del Conocimiento s/n, BioRegion Building, Granada 18016, Spain. Electronic address: iborras@cidaf.es.
³ Research and Development of Functional Food Centre (CIDAF), Health Science Technological Park Avda. del Conocimiento s/n, BioRegion Building, Granada 18016, Spain.
⁴ Research and Development of Functional Food Centre (CIDAF), Health Science Technological Park Avda. del Conocimiento s/n, BioRegion Building, Granada 18016, Spain; Department of Food Science and Nutrition, University of Granada, Campus of Cartuja, Granada 18071, Spain.
⁵ Department of Analytical Chemistry, University of Granada, Avda. Fuentenueva s/n, Granada 18071, Spain; Research and Development of Functional Food Centre (CIDAF), Health Science Technological Park Avda. del Conocimiento s/n, BioRegion Building, Granada 18016, Spain.

PMID: 33667920
DOI: 10.1016/j.foodchem.2021.129300

Abstract

Avocado peel is a by-product obtained in high amounts in the food industry with no further applications despite its richness in bioactive compounds. In this context, an efficient "green" microwave assisted extraction (MAE) was optimized to maximize the extraction of bioactive polyphenols. Moreover, the phenolic composition of the developed green avocado extract was characterized by HPLC coupled to MS analysers and the potential applications for the food industry were studied assaying different bioactivities. Thus, the matrix metalloproteinases inhibition, the antioxidant capacity and the antimicrobial activity against gram-positive and gram-negative bacteria, yeast and mold were tested. The results pointed out both, high matrix metalloproteinases inhibitory capacity and antioxidant activity of avocado peel MAE extract. These findings suggest the potential food industry applications of this extract as natural food preservative, functional food ingredient or nutraceuticals with antioxidant and anti-aging activities.

Keywords: Antioxidant activity; Avocado peel; Food ingredient; Matrix metalloproteinases inhibition; Microwave assisted extraction.

MeSH terms

Anti-Bacterial Agents / isolation & purification*
Anti-Bacterial Agents / pharmacology
Antioxidants / isolation & purification*
Antioxidants / pharmacology
Food Industry*
Gram-Negative Bacteria / drug effects
Gram-Positive Bacteria / drug effects
Microwaves*
Persea / chemistry*
Plant Extracts / isolation & purification*
Plant Extracts / pharmacology

Substances

Anti-Bacterial Agents
Antioxidants
Plant Extracts