Register      Login
Animal Production Science Animal Production Science Society
Food, fibre and pharmaceuticals from animals
RESEARCH ARTICLE

Effects of dietary flaxseed oil with or without products with antioxidant properties on pig performance, carcass characteristics, meat quality and oxidative stability

Daniela Miotto Bernardi https://orcid.org/0000-0001-9019-3835 A C * , Teresinha Marisa Bertol B , Arlei Coldebella B , Anildo Cunha Junior https://orcid.org/0000-0002-4808-080X B , Bárbara Cristina Silveira-Almeida D , Juliana Bürger Rodrigues C , Daniel Barrera-Arellano E , Helena Teixeira Godoy F , Adriana Dillenburg Meinhart F , Leandro Daniel de Paris G and Valdemiro Carlos Sgarbieri C
+ Author Affiliations
- Author Affiliations

A Departamento de Nutrição, Universidade Estadual do Oeste do Paraná, Rua Maringá 1200, Vila Nova, Francisco Beltrão, Paraná, Brazil, CEP: 85605-010.

B Embrapa Suínos e Aves, Rodovia BR 153, KM 110, Vila Tamanduá, Caixa Postal: 21, Concórdia, Santa Catarina, Brazil, CEP: 89715-899.

C Departamento de Alimentos e Nutrição, Faculdade de Engenharia de Alimentos, Universidade Estadual de Campinas – UNICAMP, Cidade Universitária Zeferino Vaz Rua Monteiro Lobato 80, Caixa Postal: 6121, Campinas, São Paulo, Brazil, CEP: 13083-862.

D Departamento de Zootecnia, Universidade Federal Rural de Pernambuco, Rua Dom Manuel de Medeiros s/n, Dois Irmãos, Recife, Pernambuco, Brazil, CEP: 52171-900.

E Departamento de Tecnologia de Alimentos, Faculdade de Engenharia de Alimentos, Universidade Estadual de Campinas – UNICAMP, Cidade Universitária Zeferino Vaz s/n, Caixa Postal: 6121, Campinas, São Paulo, Brazil, CEP: 13083-862.

F Departamento de Ciências de Alimentos, Faculdade de Engenharia de Alimentos, Universidade Estadual de Campinas – UNICAMP, Cidade Universitária Zeferino Vaz s/n, Caixa Postal: 6121, Campinas, São Paulo, Brazil, CEP: 13083-862.

G Falbom Agroindustrial Ltda, Rodovia PR-317, Km 366, Linha São Francisco, Toledo, Paraná, Brazil, CEP: 85902-600.

* Correspondence to: dani_miotto@yahoo.com.br

Handling Editor: Roger Purchas

Animal Production Science 62(18) 1789-1804 https://doi.org/10.1071/AN21458
Submitted: 14 May 2021  Accepted: 8 July 2022   Published: 12 August 2022

© 2022 The Author(s) (or their employer(s)). Published by CSIRO Publishing

Abstract

Context: The inclusion of natural products with antioxidant properties in animal diets as well as the use of different lipid sources has been tested to improve the nutritional quality of meat.

Aim: The aim of this work was to compare natural products with antioxidant properties and vitamin E in swine diets containing flaxseed oil.

Methods: Ninety-six animals were allocated to six treatments: control diet (C), diet with 3% flaxseed oil (F), diet with 3% flaxseed oil + 10% grape pomace (FGP), diet with 3% flaxseed oil + 0.0022% grape seed extract (FGE), diet with 3% flaxseed oil + 5% Nile tilapia carcass hydrolysate (FH), and diet with 3% flaxseed oil + 200 ppm vitamin E supplement (FVitE).

Key results: The treatments had no effect on growth performance or serum total antioxidant status, while low-magnitude effects on carcass traits were observed. The addition of flaxseed oil to the diet increased the omega-3 and total polyunsaturated fatty acid concentrations and decreased saturated fatty acid and monounsaturated fatty acid concentrations in meat; high concentrations of total tocopherol were observed in the treatments FVitE, FGE, and FH, while a higher oxidative stability (Rancimat®) of backfat was observed for the treatment FVitE. The thiobarbituric acid-reactive substances assay and the sensory evaluation of mini-burgers revealed that vitamin E was the most efficient antioxidant throughout the storage, although the treatments FH and FGE have presented a mild effect.

Conclusions: Problems of oxidative stability of pork resulting from including flaxseed oil in the diet of pigs due to increases in omega-3 fatty acids were better overcome by dietary vitamin E than by the use of the other natural antioxidants assessed here. However, this study also demonstrated that both the tilapia hydrolysate and grape seed extract have potential to be used as natural antioxidants, although further studies are required.

Implications: The results impact the meat industry in regard to the nutritional quality and oxidative stability of meat. Pork with higher omega-3 content and natural antioxidants can meet consumer demand for a healthier diet, besides providing higher stability throughout storage, providing an additional market niche for the pork industry.

Keywords: grape pomace, grape seed extract, linseed, meat vitamin E, mini-burgers, Nile tilapia carcass hydrolysate, omega-3, swine carcass.


References

ABCS (1973) ‘Método brasileiro de classificação de carcaças.’ (Associação Brasileira de criadores de suínos: Estrela, RS, Brasil)

Allard JP, Kurian R, Aghdassi E, Muggli R, Royall D (1997) Lipid peroxidation during n−3 fatty acid and vitamin E supplementation in humans. Lipids 32, 535–541.
Lipid peroxidation during n−3 fatty acid and vitamin E supplementation in humans.Crossref | GoogleScholarGoogle Scholar |

AOAC (1995) ‘Official methods of analysis of the Association of Official Analytical Chemists International’ (16th edn). (Association of Official Analytical Chemists: Washington, DC)

AOCS (2017) ‘Official methods and recommended practices of the AOCS.’ (7th edn). (American Oil Chemists’ Society: Washington, DC)

Benzie IFF, Strain JJ (1996) The ferric reducing ability of plasma (FRAP) as a measure of “antioxidant power”: the FRAP assay. Analytical Biochemistry 239, 70–76.
The ferric reducing ability of plasma (FRAP) as a measure of “antioxidant power”: the FRAP assay.Crossref | GoogleScholarGoogle Scholar |

Bernardi DM, Bertol TM, Pflanzer SB, Sgarbieri VC, Pollonio MAR (2016a) ω-3 in meat products: benefits and effects on lipid oxidative stability. Journal of the Science of Food and Agriculture 96, 2620–2634.
ω-3 in meat products: benefits and effects on lipid oxidative stability.Crossref | GoogleScholarGoogle Scholar |

Bernardi DM, Paris LDd, Dieterich F, Silva FGDe, Boscolo WR, Sary C, Signor A, Bertol TM, Sgarbieri VC (2016b) Production of hydrolysate from processed Nile tilapia (Oreochromis niloticus) residues and assessment of its antioxidant activity. Food Science and Technology 36, 709–716.
Production of hydrolysate from processed Nile tilapia (Oreochromis niloticus) residues and assessment of its antioxidant activity.Crossref | GoogleScholarGoogle Scholar |

Bertol TM, de Campos RML, Ludke JV, Terra NN, de Figueiredo EAP, Coldebella A, dos Santos Filho JI, Kawski VL, Lehr NM (2013) Effects of genotype and dietary oil supplementation on performance, carcass traits, pork quality and fatty acid composition of backfat and intramuscular fat. Meat Science 93, 507–516.
Effects of genotype and dietary oil supplementation on performance, carcass traits, pork quality and fatty acid composition of backfat and intramuscular fat.Crossref | GoogleScholarGoogle Scholar |

Bertol TM, Ludke JV, de Campos RML, Kawski VL, Cunha Junior A, de Figueiredo EAP (2017) Inclusion of grape pomace in the diet of pigs on pork quality and oxidative stability of omega-3 enriched fat. Ciência Rural 47, e20150358
Inclusion of grape pomace in the diet of pigs on pork quality and oxidative stability of omega-3 enriched fat.Crossref | GoogleScholarGoogle Scholar |

Bjørndal B, Berge C, Ramsvik MS, Svardal A, Bohov P, Skorve J, Berge RK (2013) A fish protein hydrolysate alters fatty acid composition in liver and adipose tissue and increases plasma carnitine levels in a mouse model of chronic inflammation. Lipids in Health and Disease 12, 143
A fish protein hydrolysate alters fatty acid composition in liver and adipose tissue and increases plasma carnitine levels in a mouse model of chronic inflammation.Crossref | GoogleScholarGoogle Scholar |

Boler DD, Gabriel SR, Yang H, Balsbaugh R, Mahan DC, Brewer MS, McKeith FK, Killefer J (2009) Effect of different dietary levels of natural-source vitamin E in grow-finish pigs on pork quality and shelf life. Meat Science 83, 723–730.
Effect of different dietary levels of natural-source vitamin E in grow-finish pigs on pork quality and shelf life.Crossref | GoogleScholarGoogle Scholar |

Brasil (2012) Resolução da Diretoria Colegiada (RDC) no 54, 12 November. Aprova o Regulamento Técnico sobre Informação Nutricional Complementar. (Ministério da Saúde - MS. Agência Nacional de Vigilância Sanitária – Anvisa) Available at http://www.anvisa.gov.br

Brenes A, Viveros A, Goñi I, Centeno C, Sáyago-Ayerdy SG, Arija I, Saura-Calixto F (2008) Effect of grape pomace concentrate and vitamin E on digestibility of polyphenols and antioxidant activity in chickens. Poultry Science 87, 307–316.
Effect of grape pomace concentrate and vitamin E on digestibility of polyphenols and antioxidant activity in chickens.Crossref | GoogleScholarGoogle Scholar |

Chamorro S, Viveros A, Rebolé A, Rica BD, Arija I, Brenes A (2015) Influence of dietary enzyme addition on polyphenol utilization and meat lipid oxidation of chicks fed grape pomace. Food Research International 73, 197–203.
Influence of dietary enzyme addition on polyphenol utilization and meat lipid oxidation of chicks fed grape pomace.Crossref | GoogleScholarGoogle Scholar |

Correa JA, Méthot S, Faucitano L (2007) A modified meat juice container (ez-driploss) procedure for a more reliable assessment of drip loss and related quality changes in pork meat. Journal of Muscle Foods 18, 67–77.
A modified meat juice container (ez-driploss) procedure for a more reliable assessment of drip loss and related quality changes in pork meat.Crossref | GoogleScholarGoogle Scholar |

Dávalos A, Gómez-Cordovés C, Bartolomé B (2004) Extending applicability of the oxygen radical absorbance capacity (ORAC-Fluorescein) Assay. Journal of Agricultural and Food Chemistry 52, 48–54.
Extending applicability of the oxygen radical absorbance capacity (ORAC-Fluorescein) Assay.Crossref | GoogleScholarGoogle Scholar |

De Paris LD, Adams Haab JC, Sary C, Bernardi DM, Boscolo WR, Signor A (2016) Production and spray drying of protein hydrolyzate obtained from tilapia processing by-products. Acta Scientiarum. Technology 38, 89–97.
Production and spray drying of protein hydrolyzate obtained from tilapia processing by-products.Crossref | GoogleScholarGoogle Scholar |

Decker EA, Akoh CC, Wilkes RS (2012) Incorporation of (n-3) fatty acids in foods: challenges and opportunities. The Journal of Nutrition 142, 610S–613S.
Incorporation of (n-3) fatty acids in foods: challenges and opportunities.Crossref | GoogleScholarGoogle Scholar |

Dugan MER, Aalhus JL, Robertson WM, Rolland DC, Larsen IL (2004) Practical dietary levels of canola oil and tallow have differing effects on gilt and barrow performance and carcass composition. Canadian Journal of Animal Science 84, 661–671.
Practical dietary levels of canola oil and tallow have differing effects on gilt and barrow performance and carcass composition.Crossref | GoogleScholarGoogle Scholar |

Duran-Montgé P, Realini CE, Barroeta AC, Lizardo R, Esteve-Garcia E (2008) Tissue fatty acid composition of pigs fed different fat sources. Animal 2, 1753–1762.
Tissue fatty acid composition of pigs fed different fat sources.Crossref | GoogleScholarGoogle Scholar |

Duran-Montgé P, Theil PK, Lauridsen C, Esteve-Garcia E (2009) Dietary fat source affects metabolism of fatty acids in pigs as evaluated by altered expression of lipogenic genes in liver and adipose tissues. Animal 3, 535–542.
Dietary fat source affects metabolism of fatty acids in pigs as evaluated by altered expression of lipogenic genes in liver and adipose tissues.Crossref | GoogleScholarGoogle Scholar |

Dutcosky, S.D. Análise sensorial de alimentos, 4a edição. Curitiba: Editora Champagnat, 2013.

(2010) Scientific opinion on dietary reference values for fats, including saturated fatty acids, polyunsaturated fatty acids, monounsaturated fatty acids, trans fatty acids, and cholesterol. EFSA Journal 8, 1461
Scientific opinion on dietary reference values for fats, including saturated fatty acids, polyunsaturated fatty acids, monounsaturated fatty acids, trans fatty acids, and cholesterol.Crossref | GoogleScholarGoogle Scholar |

Eggert JM, Grant AL, Schinckel AP (2007) Factors affecting fat distribution in pork carcasses. The Professional Animal Scientist 23, 42–53.
Factors affecting fat distribution in pork carcasses.Crossref | GoogleScholarGoogle Scholar |

Finglas PM, Roe MA, Pinchen HM, Berry R, Church SM, Dodhia SK, Farron-Wilson M, Swan G (2015) McCance and Widdowson’s the composition of foods. 7th Summary edn. (Royal Society of Chemistry: Cambridge)

Folch J, Lees M, Stanley GHS (1957) A simple method for the isolation and purification of total lipids from animal tissues. The Journal of Biological Chemistry 226, 497–509.
A simple method for the isolation and purification of total lipids from animal tissues.Crossref | GoogleScholarGoogle Scholar |

Frank J (2005) Beyond vitamin E supplementation: an alternative strategy to improve vitamin E status. Journal of Plant Physiology 162, 834–843.
Beyond vitamin E supplementation: an alternative strategy to improve vitamin E status.Crossref | GoogleScholarGoogle Scholar |

Girgih AT, He R, Hasan FM, Udenigwe CC, Gill TA, Aluko RE (2015) Evaluation of the in vitro antioxidant properties of a cod (Gadus morhua) protein hydrolysate and peptide fractions. Food Chemistry 173, 652–659.
Evaluation of the in vitro antioxidant properties of a cod (Gadus morhua) protein hydrolysate and peptide fractions.Crossref | GoogleScholarGoogle Scholar |

Gladine C, Morand C, Rock E, Bauchart D, Durand D (2007) Plant extracts rich in polyphenols (PERP) are efficient antioxidants to prevent lipoperoxidation in plasma lipids from animals fed n−3 PUFA supplemented diets. Animal Feed Science and Technology 136, 281–296.
Plant extracts rich in polyphenols (PERP) are efficient antioxidants to prevent lipoperoxidation in plasma lipids from animals fed n−3 PUFA supplemented diets.Crossref | GoogleScholarGoogle Scholar |

Guidoni AL, Dallacosta OA, Bertol TM (2007) Preditores e predição do peso, porcentagem e quantidade de carne de carcaça suínas e suas partes. Relatório Técnico da Empresa Brasileira de Pesquisa Agropecuária.

Guo Q, Richert BT, Burgess JR, Webel DM, Orr DE, Blair M, Fitzner GE, Hall DD, Grant AL, Gerrard DE (2006) Effects of dietary vitamin E and fat supplementation on pork quality. Journal of Animal Science 84, 3089–3099.
Effects of dietary vitamin E and fat supplementation on pork quality.Crossref | GoogleScholarGoogle Scholar |

Haak L, Raes K, Van Dyck S, De Smet S (2008a) Effect of dietary rosemary and α-tocopheryl acetate on the oxidative stability of raw and cooked pork following oxidized linseed oil administration. Meat Science 78, 239–247.
Effect of dietary rosemary and α-tocopheryl acetate on the oxidative stability of raw and cooked pork following oxidized linseed oil administration.Crossref | GoogleScholarGoogle Scholar |

Haak L, De Smet S, Fremaut D, Van Walleghem K, Raes K (2008b) Fatty acid profile and oxidative stability of pork as influenced by duration and time of dietary linseed or fish oil supplementation. Journal of Animal Science 86, 1418–1425.
Fatty acid profile and oxidative stability of pork as influenced by duration and time of dietary linseed or fish oil supplementation.Crossref | GoogleScholarGoogle Scholar |

Hartman L, Lago RCA (1973) Rapid preparation of fatty acid methyl esters from lipids. Laboratory Practice 22, 475–476.

Honikel KO (1998) Reference methods for the assessment of physical characteristics of meat. Meat Science 49, 447–457.
Reference methods for the assessment of physical characteristics of meat.Crossref | GoogleScholarGoogle Scholar |

Hu ZP, Wang T, Ahmad H, Zhang JF, Zhang LL, Zhong X (2015) Effects of different formulations of α-tocopherol acetate (vitamin E) on growth performance, meat quality and antioxidant capacity in broiler chickens. British Poultry Science 56, 687–695.
Effects of different formulations of α-tocopherol acetate (vitamin E) on growth performance, meat quality and antioxidant capacity in broiler chickens.Crossref | GoogleScholarGoogle Scholar |

Juárez M, Dugan MER, Aldai N, Aalhus JL, Patience JF, Zijlstra RT, Beaulieu AD (2011a) Increasing omega-3 levels through dietary co-extruded flaxseed supplementation negatively affects pork palatability. Food Chemistry 126, 1716–1723.
Increasing omega-3 levels through dietary co-extruded flaxseed supplementation negatively affects pork palatability.Crossref | GoogleScholarGoogle Scholar |

Juárez M, Dugan MER, Larsen IL, Thacker R, Rolland DC, Aalhus JL (2011b) Oxidative stability in grinds from omega-3 enhanced pork. Canadian Journal of Animal Science 91, 623–634.
Oxidative stability in grinds from omega-3 enhanced pork.Crossref | GoogleScholarGoogle Scholar |

Kajla P, Sharma A, Sood DR (2015) Flaxseed—a potential functional food source. Journal of Food Science and Technology 52, 1857–1871.
Flaxseed—a potential functional food source.Crossref | GoogleScholarGoogle Scholar |

Lafka T-I, Sinanoglou V, Lazos ES (2007) On the extraction and antioxidant activity of phenolic compounds from winery wastes. Food Chemistry 104, 1206–1214.
On the extraction and antioxidant activity of phenolic compounds from winery wastes.Crossref | GoogleScholarGoogle Scholar |

Lauridsen C, Theil PK, Jensen SK (2013) Composition of α-tocopherol and fatty acids in porcine tissues after dietary supplementation with vitamin E and different fat sources. Animal Feed Science and Technology 179, 93–102.
Composition of α-tocopherol and fatty acids in porcine tissues after dietary supplementation with vitamin E and different fat sources.Crossref | GoogleScholarGoogle Scholar |

Liaset B, Madsen L, Hao Q, Criales G, Mellgren G, Marschall H-U, Hallenborg P, Espe M, Frøyland L, Kristiansen K (2009) Fish protein hydrolysate elevates plasma bile acids and reduces visceral adipose tissue mass in rats. Biochimica et Biophysica Acta (BBA) - Molecular and Cell Biology of Lipids 1791, 254–262.
Fish protein hydrolysate elevates plasma bile acids and reduces visceral adipose tissue mass in rats.Crossref | GoogleScholarGoogle Scholar |

Little AC (1975) A research note off on a tangent. Journal of Food Science 40, 410–411.
A research note off on a tangent.Crossref | GoogleScholarGoogle Scholar |

Mairesse G, Benet M, Méteau K, Juin H, Durand D, Mourot J (2011) Effect of plant antioxidant in n-3 polyunsaturated fatty acid-enriched diet on fatty acid composition and sensorial attributes of dry-cured ham. International Journal of Food Science & Technology 46, 2656–2662.
Effect of plant antioxidant in n-3 polyunsaturated fatty acid-enriched diet on fatty acid composition and sensorial attributes of dry-cured ham.Crossref | GoogleScholarGoogle Scholar |

Nørgaard JV, Blaabjerg K, Poulsen HD (2012) Salmon protein hydrolysate as a protein source in feed for young pigs. Animal Feed Science and Technology 177, 124–129.
Salmon protein hydrolysate as a protein source in feed for young pigs.Crossref | GoogleScholarGoogle Scholar |

NPPC (1999) ‘Pork quality standards.’ (National Pork Producers Council: Des Moines, IA)

O’Grady MN, Maher M, Troy DJ, Moloney AP, Kerry JP (2006) An assessment of dietary supplementation with tea catechins and rosemary extract on the quality of fresh beef. Meat Science 73, 132–143.
An assessment of dietary supplementation with tea catechins and rosemary extract on the quality of fresh beef.Crossref | GoogleScholarGoogle Scholar |

O’Grady MN, Carpenter R, Lynch PB, O’Brien NM, Kerry JP (2008) Addition of grape seed extract and bearberry to porcine diets: influence on quality attributes of raw and cooked pork. Meat Science 78, 438–446.
Addition of grape seed extract and bearberry to porcine diets: influence on quality attributes of raw and cooked pork.Crossref | GoogleScholarGoogle Scholar |

Pinheiro-Sant’Ana HM, Guinazi M, Oliveira DdS, Della Lucia CM, Reis BdL, Brandão SCC (2011) Method for simultaneous analysis of eight vitamin E isomers in various foods by high performance liquid chromatography and fluorescence detection. Journal of Chromatography A 1218, 8496–8502.
Method for simultaneous analysis of eight vitamin E isomers in various foods by high performance liquid chromatography and fluorescence detection.Crossref | GoogleScholarGoogle Scholar |

Re R, Pellegrini N, Proteggente A, Pannala A, Yang M, Rice-Evans C (1999) Antioxidant activity applying an improved ABTS radical cation decolorization assay. Free Radical Biology and Medicine 26, 1231–1237.
Antioxidant activity applying an improved ABTS radical cation decolorization assay.Crossref | GoogleScholarGoogle Scholar |

Realini CE, Duran-Montgé P, Lizardo R, Gispert M, Oliver MA, Esteve-Garcia E (2010) Effect of source of dietary fat on pig performance, carcass characteristics and carcass fat content, distribution and fatty acid composition. Meat Science 85, 606–612.
Effect of source of dietary fat on pig performance, carcass characteristics and carcass fat content, distribution and fatty acid composition.Crossref | GoogleScholarGoogle Scholar |

Rosenvold K, Andersen HJ (2003) Factors of significance for pork quality—a review. Meat Science 64, 219–237.
Factors of significance for pork quality—a review.Crossref | GoogleScholarGoogle Scholar |

Rostagno HS (2005) ‘Tabelas brasileiras para aves e suínos.’ (Universidade Federal de Viçosa: Viçosa, MG)

Sales J, Koukolová V (2011) Dietary vitamin E and lipid and color stability of beef and pork: modeling of relationships. Journal of Animal Science 89, 2836–2848.
Dietary vitamin E and lipid and color stability of beef and pork: modeling of relationships.Crossref | GoogleScholarGoogle Scholar |

Samaranayaka AGP, Li-Chan ECY (2011) Food-derived peptidic antioxidants: a review of their production, assessment, and potential applications. Journal of Functional Foods 3, 229–254.
Food-derived peptidic antioxidants: a review of their production, assessment, and potential applications.Crossref | GoogleScholarGoogle Scholar |

Santos C, Hoz L, Cambero MI, Cabeza MC, Ordóñez JA (2008) Enrichment of dry-cured ham with α-linolenic acid and α-tocopherol by the use of linseed oil and α-tocopheryl acetate in pig diets. Meat Science 80, 668–674.
Enrichment of dry-cured ham with α-linolenic acid and α-tocopherol by the use of linseed oil and α-tocopheryl acetate in pig diets.Crossref | GoogleScholarGoogle Scholar |

SAS Institute Inc. (2001) ‘SAS/STAT user’s guide: statistics. Version 8.’ (SAS Institute Inc.: Cary)

Sáyago-Ayerdi SG, Brenes A, Viveros A, Goñi I (2009) Antioxidative effect of dietary grape pomace concentrate on lipid oxidation of chilled and long-term frozen stored chicken patties. Meat Science 83, 528–533.
Antioxidative effect of dietary grape pomace concentrate on lipid oxidation of chilled and long-term frozen stored chicken patties.Crossref | GoogleScholarGoogle Scholar |

Teye GA, Sheard PR, Whittington FM, Nute GR, Stewart A, Wood JD (2006) Influence of dietary oils and protein level on pork quality. 1. Effects on muscle fatty acid composition, carcass, meat and eating quality. Meat Science 73, 157–165.
Influence of dietary oils and protein level on pork quality. 1. Effects on muscle fatty acid composition, carcass, meat and eating quality.Crossref | GoogleScholarGoogle Scholar |

Trumbo P, Schlicker S, Yates AA, Poos M, Food and Nutrition Board of the Institute of Medicine, The National Academies (2002) Dietary reference intakes for energy, carbohydrate, fiber, fat, fatty acids, cholesterol, protein and amino acids. Journal of the American Dietetic Association 102, 1621–1630.
Dietary reference intakes for energy, carbohydrate, fiber, fat, fatty acids, cholesterol, protein and amino acids.Crossref | GoogleScholarGoogle Scholar |

Turner TD, Mapiye C, Aalhus JL, Beaulieu AD, Patience JF, Zijlstra RT, Dugan MER (2014) Flaxseed fed pork: n − 3 fatty acid enrichment and contribution to dietary recommendations. Meat Science 96, 541–547.
Flaxseed fed pork: n − 3 fatty acid enrichment and contribution to dietary recommendations.Crossref | GoogleScholarGoogle Scholar |

Vyncke W (1970) Direct determination of the thiobarbituric acid value in trichloracetic acid extracts of fish as a measure of oxidative rancidity. Fette, Seifen, Anstrichmittel 72, 1084–1087.
Direct determination of the thiobarbituric acid value in trichloracetic acid extracts of fish as a measure of oxidative rancidity.Crossref | GoogleScholarGoogle Scholar |

Wang H, Wang L-S, Shi B-M, Shan A-S (2012) Effects of dietary corn dried distillers grains with solubles and vitamin E on growth performance, meat quality, fatty acid profiles, and pork shelf life of finishing pigs. Livestock Science 149, 155–166.
Effects of dietary corn dried distillers grains with solubles and vitamin E on growth performance, meat quality, fatty acid profiles, and pork shelf life of finishing pigs.Crossref | GoogleScholarGoogle Scholar |

Wiriyaphan C, Xiao H, Decker EA, Yongsawatdigul J (2015) Chemical and cellular antioxidative properties of threadfin bream (Nemipterus spp.) surimi byproduct hydrolysates fractionated by ultrafiltration. Food Chemistry 167, 7–15.
Chemical and cellular antioxidative properties of threadfin bream (Nemipterus spp.) surimi byproduct hydrolysates fractionated by ultrafiltration.Crossref | GoogleScholarGoogle Scholar |

Yan L, Kim IH (2011) Effect of dietary grape pomace fermented by Saccharomyces boulardii on the growth performance, nutrient digestibility and meat quality in finishing pigs. Asian-Australasian Journal of Animal Sciences 24, 1763–1770.
Effect of dietary grape pomace fermented by Saccharomyces boulardii on the growth performance, nutrient digestibility and meat quality in finishing pigs.Crossref | GoogleScholarGoogle Scholar |