Why is zinc supplementation recommended in hepatic encephalopathy?

• A. Zinc reduces ammonia production.
• B. Zinc deficiency is very common in liver disease and zinc supplementation improves amino acid metabolism and encephalopathy.
• C. Zinc acts as a cofactor for urea cycle enzymes.
• D. Zinc supplementation improves liver enzyme synthesis.

Answer: (D)

Zinc supports production and function of hepatic enzymes involved in ammonia detoxification. In liver disease, zinc deficiency is common, and replenishing zinc helps the liver synthesize and properly activate enzymes of the urea cycle, which enhances the conversion of ammonia to urea. With more effective urea cycle activity, ammonia levels fall and hepatic encephalopathy improves. This is why zinc supplementation is viewed as helping liver enzyme synthesis, providing a tangible mechanism that translates into better detoxification of ammonia.