Journal
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
Volume 95, Issue 1, Pages 103-110Publisher
WILEY
DOI: 10.1002/jsfa.6688
Keywords
semitendinosus; longissimus thoracis; metmyoglobin; plasma; light lamb
Funding
- Ministry of Education and Science of Spain
- European Union [INIA-RTA 2009-0091-C02-01, RZ2010-0002]
- INIA
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BACKGROUNDThe use of concentrates supplemented with -tocopherol in animals is an effective method to reduce the oxidative processes that occur in meat products. The high cost of -tocopherol requires accurate feeding, so it is necessary to define the minimum period of -tocopherol concentrate supplementation that will ensure an acceptable meat quality. Indoor concentrate-fed light lambs (n = 35) were supplemented with 500 mg dl--tocopheryl acetate (VE) kg(-1) concentrate for a period of between 4 and 28 days before being slaughtered at 22-24 kg body weight. Control lambs (n = 12) were not supplemented with -tocopherol. RESULTSThe -tocopherol content in both plasma and muscle tissues increased significantly with the length of supplementation (P < 0.001). The thiobarbituric acid-reactive substance (TBARS) concentration in meat decreased exponentially when the muscle -tocopherol concentration was increased to 0.61-0.90 mg kg(-1) fresh meat (P < 0.05). After 7 days of display, the formation of metmyoglobin (MMb) decreased significantly as the -tocopherol content increased to 0.31-0.60 mg kg(-1) meat (P < 0.05). CONCLUSIONA range of 0.61-0.90 mg -tocopherol kg(-1) fresh meat protected fresh lamb meat from lipid oxidation and MMb formation. This level can be achieved by supplementation with 500 mg VE kg(-1) concentrate for a period of 7-14 days before slaughter. (c) 2014 Society of Chemical Industry
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