Abstract

ECHARTE, M.; CONCHILLO, A.; ANSORENA, D.  and  ASTIASARAN, I.. Cholesterol oxidation products in fresh and frozen shrimps, raw and grilled. Nutr. Hosp. [online]. 2005, vol.20, n.4, pp.293-296. ISSN 1699-5198.

Cholesterol oxidation products (COPs) have been related to different toxic effects, being the atherosclerotic process one of the best known. The presence of cholesterol oxides in freshly and frozenly commercialised shrimps, both raw and grilled, was studied. The determination was made by gas chromatography-mass spectrometry (GCMS). Fresh shrimps showed significant amounts of all analysed COPs, except for 7α-hydroxycholesterol, accounting in total for 33.15 µg COPs/g fat. In contrast, in frozen commercialised shrimps only 7-ketocholesterol and 7ß-hydroxycholesterol were detected. These results point out the great effectiveness of the commercialisation of this type of products under freezing, in terms of to the minimisation of the COPs formation. The cooking method (grilling) increased the COPs content in both types of shrimps, reaching 55.43 µg COPs/g fat in fresh shrimps and only 13.06 µg COPs/g fat in frozen ones.

Keywords : Oxidation; Cooking methods; Oxysterols; Seafood.

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