If liver dysfunction persists after addressing other causes in PN, which supplement may be added if a deficiency exists?

If liver dysfunction persists after addressing other causes in PN, which supplement may be added if a deficiency exists?

• A. Vitamin C
• B. Carnitine
• C. Vitamin D
• D. Glutamine

Answer: (B)

Carnitine supplementation is the best choice when PN-related liver dysfunction persists and a deficiency is possible. Carnitine is essential for transporting long-chain fatty acids into mitochondria for beta-oxidation, a key step in fat metabolism. In PN, carnitine deficiency can impair fatty acid oxidation, leading to fat buildup in the liver and worsening liver function tests. Providing carnitine helps restore this transport system, enhances fatty acid use for energy, and can improve hepatic fat clearance when a deficiency exists. While vitamins C and D and glutamine have important roles in antioxidant status, bone health, and gut/immune support, they do not specifically target the metabolic bottleneck in PN-associated liver dysfunction that carnitine addresses.

Carnitine supplementation is the best choice when PN-related liver dysfunction persists and a deficiency is possible. Carnitine is essential for transporting long-chain fatty acids into mitochondria for beta-oxidation, a key step in fat metabolism. In PN, carnitine deficiency can impair fatty acid oxidation, leading to fat buildup in the liver and worsening liver function tests. Providing carnitine helps restore this transport system, enhances fatty acid use for energy, and can improve hepatic fat clearance when a deficiency exists. While vitamins C and D and glutamine have important roles in antioxidant status, bone health, and gut/immune support, they do not specifically target the metabolic bottleneck in PN-associated liver dysfunction that carnitine addresses.