Vitamin E supplementation moderates salt-induced oxidation status in beef

Area of Science:

• Animal Science
• Food Science
• Nutritional Biochemistry

Background:

• Post-slaughter meat deterioration, particularly salt-induced changes, is a significant concern in beef production.
• Conventional salt treatments can overwhelm the natural antioxidant systems in muscle tissue, leading to quality degradation.
• Dietary vitamin E (VE) is known to enhance antioxidant capacity and protect cell membranes.

Purpose of the Study:

• To investigate dietary vitamin E (VE) as an in vivo fortification strategy to protect calf muscle against post-slaughter salt-induced deterioration.
• To optimize a pre-slaughter VE supplementation protocol for enhancing oxidative stability in beef.
• To determine the most effective VE concentration and duration for maximizing antioxidant benefits.

Main Methods:

• Two experiments were conducted on male calves involving different dietary concentrations and durations of alpha-tocopherol acetate supplementation.
• Experiment 1 compared control, medium-dose, and high-dose VE supplementation over 60 days.
• Experiment 2 evaluated a high-dose VE regimen for 10, 25, or 40 days to determine the minimum effective duration.

Main Results:

• High-dose VE supplementation (4.4 g/d) maximized muscle VE accumulation, minimized salt-induced lipid peroxidation, and preserved meat redness (a* values).
• A 40-day high-dose VE regimen (3.7 g/d) significantly increased muscle VE levels, neutralized lipid peroxidation, and preserved meat pigment.
• The 40-day supplementation demonstrated superior results compared to shorter durations and control groups.

Conclusions:

• A standardized 40-day, high-dose vitamin E feeding protocol effectively fortifies calf muscle in vivo before harvest.
• This pre-slaughter VE supplementation provides a robust physiological defense against post-slaughter salt processing.
• The optimized protocol ensures superior oxidative stability and meat quality in beef products.