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Vitamin E intake and systemic antioxidant status in competitive endurance horses

Published online by Cambridge University Press:  09 March 2007

CA Williams*
Affiliation:
Department of Animal and Poultry Science, Virginia Polytechnic Institute and State University, Blacksburg VA 24061, USA
TM Hess
Affiliation:
Department of Animal and Poultry Science, Virginia Polytechnic Institute and State University, Blacksburg VA 24061, USA
KE Saker
Affiliation:
Virginia-Maryland Regional College of Veterinary Medicine, Blacksburg VA 24061, USA
JE Waldron
Affiliation:
Rectortown Equine Clinic, Rectortown VA 20118, USA
PA Harris
Affiliation:
Equine Studies Group, WALTHAM Centre for Pet Nutrition, Melton, Mowbray, UK
*
*Rutgers, The State University of New Jersey, Cook Campus, 84 Lipman Drive, New Brunswick, NJ 08901; Email: cwilliams@aesop.rutgers.edu
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Abstract

The objective was to compare vitamin E content in the total diet of Arabian horses competing in the 80 km Research Ride 2002 to the oxidative stress and antioxidant measures throughout the race. Prior to the race, riders completed a detailed nutritional survey, which was used to calculate vitamin E intake. Blood samples, temperature and heart rate were taken the day before the race, at 27 and 48 km during the race, at race completion or elimination and 3 h after race completion. Plasma lipid hydroperoxides, α-tocopherol (TOC), creatine kinase (CK), aspartate aminotransferase (AST), albumin, red and white blood cell total glutathione and glutathione peroxidase were measured. Data were analyzed by Pearson's correlation in SAS. From the survey, it was estimated that horses consumed 2265±114 IU day−1 of vitamin E. A negative correlation was found between the vitamin E intake and CK (r = −0.23; P = 0.002), and AST (r = −0.22; P = 0.003). A positive correlation was found between the vitamin E intake and plasma TOC (r = 0.15; P = 0.005) at all sample times. This suggests that intensely exercising horses supplemented with vitamin E may not have an improved welfare and performance if they are supplemented vitamin E versus what is naturally found in forages and commercial feeds.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2005

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References

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