Effect of dietary rapeseed oil and humus-containing mineral preparation on cholesterol and cholesterol oxidation products content in pork

Abstract

Two groups of finishing borrows (final crossbreeds of (Polish Landrace(maternal) × Large White Breed) × Pietrain(paternal)) were fed a commercial feed (control group CG) enriched with either rapeseed oil or humus-containing mineral preparation (experimental group EG). Samples of tissue fat extracted from Semimembranous muscle contained an average of 12.95 mg/g cholesterol (CG) and 13.14 mg/g (EG). Used feed supplementation had significant effect on the inhibition of cholesterol oxidation process in pork. Sum of cholesterol oxidation products was lower in raw material of pigs fed enriched diet than in those fed only commercial diet. Additionally, cholesterol contained in raw material of finishers fed experimental diet was less susceptible to oxidation during storage. Results showed that samples of EG contain significantly (p ≤ 0.05) less of such compounds as: 7α-hydroxycholesterol, 7β-hydroxycholesterol, 5,6α-epoxycholesterol, 5,6β-epoxycholesterol, 20α-hydroxycholesterol and cholestantriol in comparison with the control group. Results highlight the potential of using rapeseed oil and humus-containing mineral preparation to prevent cholesterol oxidation of pork.