L Carnitine Linus Pauling Institute Oregon State University Acetyl L carnitine improves cognitive functions in severe hepatic encephalopathy: a randomized and controlled clinical trial Metabolic Brain Disease Springer Nature Link Impaired brain function improved by l carnitine in patients with cirrhosis: evaluation using near infrared spectroscopy Scientific Reports Established and novel treatment modalities used in hepatic encephalopathy treatment. Covert Hepatic Encephalopathy: Not as Minimal as You Might Think Clinical Gastroenterology and Hepatology