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Extracts from the edible insects Acheta domesticus and Tenebrio molitor with improved fatty acid profile due to ultrasound assisted or pressurized liquid extraction

Author:
Otero, Paz, Gutierrez-Docio, Alba, Navarro del Hierro, Joaquin, Reglero, Guillermo, Martin, Diana
Source:
Food chemistry 2020 v.314 pp. 126200
ISSN:
0308-8146
Subject:
Acheta domesticus, Tenebrio molitor, cholesterol, edible insects, ethanol, fatty acid composition, linoleic acid, liquids, monounsaturated fatty acids, polyunsaturated fatty acids, saturated fatty acids, ultrasonic treatment, ultrasonics
Abstract:
Extracts from the edible insects Acheta domesticus and Tenebrio molitor were obtained by ultrasound-assisted extraction (UAE) and pressurized-liquid extraction (PLE) using ethanol (E) or ethanol:water (E:W). Extraction yield, fatty acid profile, nutritional impact and cholesterol content were determined and compared with the initial insects. The highest extraction yield corresponded to PLE-T. molitor extracts. A decrease in total saturated fatty acid (SFA) and monounsaturated fatty acid (MUFA) contents, and an increase in the total polyunsaturated fatty acid (PUFA) content were observed for both UAE-E:W insect extracts, due to an enrichment in linoleic acid. The lipid indices (PUFA/SFA ratio, atherogenic and thrombogenic indices) for both UAE-E:W extracts were significantly improved compared with the initial insects. Although either extraction procedure led to cholesterol enrichment, the UAE-E:W conditions favoured the lowest concentration. Therefore, insects extracts with improved fatty acid profile can be selectively obtained, being UAE-E:W conditions preferred from the nutritional point of view.
Agid:
6815205