A COMPARISON OF RICE BRAN OIL AND CORN OIL IN THE EQUINE DIET

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Middle Tennessee State University

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Rice bran oil (RBO) has gained attention as a fat and potential antioxidant supplement, but there is limited research examining this supplement in the equine diet. This study compared the effect of RBO versus corn oil (CO) on non-esterified fatty acids (NEFA) and triglyceride (TG) concentrations, rump fat (RF), forearm (ARM) and gaskin (GAS) circumference, and total antioxidant status (TAS) in lightly exercised horses. Twelve mature horses were randomly assigned to a cross-over design where they received either RBO or CO at a rate of 324 mg/kg BW/d for 35 days. After 5 weeks of supplementation, the horses were given a 3-week washout period with no oil supplement, followed by 35 days of the opposing treatment. During both periods, on days 0, 17, and 35, RF, GAS and ARM circumference, and BW were measured and blood was obtained. Serum NEFA, TAS, and TG were analyzed. No differences were found in RBO vs CO in any variables measured, BW (P = 0.11), RF (P = 0.68), GAS (P = 0.70), ARM (P = 0.33), TG (P = 0.70), NEFA (P = 0.46), or TAS (P = 0.16). The current study indicates that RBO has similar effects to CO when fed as a fat supplement to horses.

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