Changes of Fatty Acid Profiles and Content of Sterols, Tocopherols and Carotenoids in Pork by Antioxidant Type Phytonutrients

Abstract

The objectives of this study were to determine the effect of 3.5 and 7.5 mg 96% Larix sibirica dihydroquercetin/kg/d (samples D1 and D2), or 0.255 and 0.545 g dry distilled Rosa damascena petals (DDRP)/kg/d (samples R1 and R2) used as supplements to pigs diet until the last 45 d prior to harvest on fatty acid composition and contents of sterols, tocopherols and carotenoids in Longissimus lumborum et thoracis and Semimembranosus muscles, backfat and leaf fat stored 24h at 0-4°C. The dihydroquercetin or DDRP supplementation increases the amount of unsaturated fatty acids with 1.2 - 4.3% of two muscles and backfat. The addition of DDRP/kg/d to the feed of pigs causes a reduction in the sterols in m. Semimembranosus and backfat, while in leaf fat, no affect. In contrast, the pronounced increase of sterols in m. Longissimus lumborum et thoracis were found when dihydroquercetin or DDRP were added. The supplementation of antioxidant type phytonutrients leads to significant (p < 0.05) increase of tocopherols in both muscles and in samples R2 of backfat. The carotenoids decreasing was observed in backfat, m. Longissimus lumborum et thoracis and m. Semimembranosus excluding samples D2 at m. Semimembranosus and samples R1, R2, and D2 leaf fat.