Effects of various fat sources, alpha-tocopheryl acetate, and ascorbic acid supplements on fatty acid composition and alpha-tocopherol content in raw and vacuum-packed, cooked dark chicken meat.
A factorial design was used to study the effects of dietary fat sources (beef tallow, fresh and oxidized sunflower oils, and linseed oil), alpha-tocopheryl acetate (0 and 225 mg/kg), and ascorbic acid (0 and 110 mg/ kg) supplementation on fatty acid composition, as well as on fat and alpha-tocopherol content in vacuum-packed raw and cooked meat stored at -20 degrees C. Raw meat fatty acid composition was affected by dietary fat sources and tocopheryl acetate supplementation. After cooking, meat composition was only affected by dietary fat sources. Birds fed linseed oil yielded meat rich in n-3 fatty acids, especially linolenic acid, which provides about 20% of the adequate intake for this fatty acid. Birds fed sunflower or oxidized sunflower oil produced meat rich in n-6 fatty acids, whereas those fed beef tallow resulted in meat rich in saturated and monounsaturated fatty acids. Raw and cooked dark chicken meat alpha-tocopherol content was only affected by tocopherol supplementation. Supplementation with alpha-tocopheryl acetate led to alpha-tocopherol-enriched meat, which provides about 25% of the recommended dietary allowance. Moreover, this content in vacuum-packed samples was not modified even after 7 mo of storage at -20 degrees C.
Bou
R
R
Nutrition and Food Science Department-CeRTA, Faculty of Pharmacy, University of Barcelona, Av. Joan XXIII s/n., 08028 Barcelona, Spain. ricard_bou@ub.edu
Grimpa
S
S
Guardiola
F
F
Barroeta
A C
AC
Codony
R
R
D000821:Animal Feed; D000818:Animals; D000975:Antioxidants / Q000008:administration & dosage / Q000032:analysis; D001205:Ascorbic Acid / Q000008:administration & dosage; D002645:Chickens; D004041:Dietary Fats / Q000008:administration & dosage* / Q000032:analysis / Q000378:metabolism; D019587:Dietary Supplements; D004305:Dose-Response Relationship, Drug; D005223:Fats; D005227:Fatty Acids / Q000008:administration & dosage* / Q000032:analysis*; D005511:Food Handling / Q000379:methods*; D018857:Food Packaging / Q000379:methods; D008043:Linseed Oil; D010084:Oxidation-Reduction; D010938:Plant Oils; D011202:Poultry Products / Q000592:standards*; D000074242:Sunflower Oil; D024505:Tocopherols; D014618:Vacuum; D024502:alpha-Tocopherol / Q000008:administration & dosage* / Q000031:analogs & derivatives / Q000032:analysis*
D000975:Antioxidants; D004041:Dietary Fats; D005223:Fats; D005227:Fatty Acids; D010938:Plant Oils; D000074242:Sunflower Oil; D008043:Linseed Oil; C013698:tallow; D024502:alpha-Tocopherol; D001205:Ascorbic Acid; D024505:Tocopherols