title: Effect of storage on retinol concentration of Cobb and Ross strain chicken livers.
abstract: Liver is an important item in the human diet. The present study examined the retinol concentration in the fresh livers of Cobb and Ross chicken strains, after freezing at -18 degrees C for 90 days. The retinol dosage in the liver was determined by high-performance liquid chromatography. The poultry strain significantly influenced liver retinol levels. The mean retinol value in the fresh samples was 6,678.0+/-1,337.7 and 8,324.1+/-1,158.5 microg/100 g in the Cobb and Ross strains, respectively. These values decreased significantly with liver storage time and reached levels that were 44.1% lower than those of fresh liver after 90 days. The results showed a high concentration of retinol in the chicken livers and demonstrated that more than 30 days of storage causes decreased retinol. Despite the losses resulting from freezing, the ingestion of a typical 100 g portion of liver, regardless of the chicken strain analyzed, exceeds the tolerable upper intake level of vitamin A (3,000 microg/day) for adults.
authors.affiliation: Bioscience Center, Department of Biochemistry, Federal University of Rio Grande do Norte, Natal, RN, Brazil.
authors.forename: Videanny Videnov Alves
authors.initials: VV
authors.lastname: Dos Santos
authors.forename: Ana Paula Marques
authors.initials: AP
authors.lastname: Da Costa
authors.forename: Nathália Karoline Medeiros
authors.initials: NK
authors.lastname: Soares
authors.forename: Jeane Franco
authors.initials: JF
authors.lastname: Pires
authors.forename: Heryka Myrna Maia
authors.initials: HM
authors.lastname: Ramalho
authors.forename: Roberto
authors.initials: R
authors.lastname: Dimenstein
mesh_terms: D000328:Adult; D000818:Animals; D002645:Chickens / Q000145:classification; D002851:Chromatography, High Pressure Liquid; D003080:Cold Temperature; D004032:Diet; D061353:Food Storage / Q000379:methods*; D005615:Freezing; D006801:Humans; D008099:Liver / Q000737:chemistry*; D008460:Meat / Q000032:analysis*; D018673:Nutrition Policy; D012016:Reference Values; D013045:Species Specificity; D014801:Vitamin A / Q000032:analysis*; D014815:Vitamins / Q000032:analysis*
chemical_list: D014815:Vitamins; D014801:Vitamin A