What roles do vitamins play in preventing oxidative stress in high-producing animals?

What roles do vitamins play in preventing oxidative stress in high-producing animals?

• A. Vitamin E and selenium support antioxidant defense; vitamins A and C contribute to immune function and tissue health.
• B. Vitamin E and vitamin C are the only nutrients needed to prevent oxidative stress.
• C. Vitamin A alone prevents oxidative stress.
• D. Selenium has no role in antioxidant defense.

Answer: (A)

High-producing animals generate more reactive oxygen species due to their accelerated metabolism, so their antioxidant defense needs to be a coordinated network. Vitamin E acts as the main lipid-soluble antioxidant, protecting cell membranes from lipid peroxidation. Vitamin C is a water-soluble antioxidant that scavenges reactive oxygen species in aqueous compartments and helps regenerate oxidized vitamin E, sustaining membrane protection. Vitamin A supports immune function and epithelial tissue health, helping to keep infections and inflammatory processes from worsening oxidative stress. Selenium, while not a vitamin, works with these vitamins by forming selenoproteins like glutathione peroxidase that detoxify peroxides. Together, these nutrients provide a combined defense: vitamin E and selenium bolster enzymatic and non-enzymatic antioxidant systems, while vitamins A and C support immune function and tissue integrity. That integrated perspective is why this option is the best fit.

High-producing animals generate more reactive oxygen species due to their accelerated metabolism, so their antioxidant defense needs to be a coordinated network. Vitamin E acts as the main lipid-soluble antioxidant, protecting cell membranes from lipid peroxidation. Vitamin C is a water-soluble antioxidant that scavenges reactive oxygen species in aqueous compartments and helps regenerate oxidized vitamin E, sustaining membrane protection. Vitamin A supports immune function and epithelial tissue health, helping to keep infections and inflammatory processes from worsening oxidative stress. Selenium, while not a vitamin, works with these vitamins by forming selenoproteins like glutathione peroxidase that detoxify peroxides. Together, these nutrients provide a combined defense: vitamin E and selenium bolster enzymatic and non-enzymatic antioxidant systems, while vitamins A and C support immune function and tissue integrity. That integrated perspective is why this option is the best fit.