Effects of pan-frying on PUFA, MUFA and individual lipid content in Spicara smaris

Zervou, A. and Sinanoglou, V. and Papadas, G. and Thomaidis, N. and Meimaroglou, D. and Miniadis-Meimaroglou, S. (2012) Effects of pan-frying on PUFA, MUFA and individual lipid content in Spicara smaris. Acta Alimentaria, 41 (1). pp. 33-44. ISSN 0139-3006

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Abstract

The effects of different frying methods (oil free, extra virgin olive oil and sunflower oil pan-fried) on proximate, neutral and polar lipid composition as well as the fatty acid content of Spicara smaris, a fish species commonly consumed by Mediterranean people, were determined. Pan-frying caused insignificant changes in proteins and polar lipids, whereas a significant (P<0.05) decrease in moisture and ash content, and a significant (P<0.05) increase in the neutral lipids and total sterol content could be detected after pan frying in extra virgin olive oil (EVOO) and sunflower oil. The loss of the individual phospholipid content was not significant during the pan-frying process, but its proportion was influenced by the uptake of the culinary fat. The absorption of oil medium in pan-fried, in EVOO, and in sunflower oil samples resulted in an alteration of their fatty acid profiles including a significant (P<0.05) increase of C18:1ω-9 and C18:2ω-6 ratios and a decrease of EPA, DHA percentages as well as of the ω-3/ω-6 ratio. All frying methods affected (P<0.05) lipid quality indices but their values could be considered satisfactory in terms of healthiness. Among the fried samples, the oil free fried samples also presented the poorest triglyceride and cholesterol content, and the greatest ω-3/ω-6 ratio, thus, they were found to present the most appropriate frying method for healthy eating.

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