Acetyl L carnitine improves cognitive functions in severe hepatic encephalopathy: a randomized and controlled clinical trial Metabolic Brain Disease Springer Nature Link Oral Acetyl L Carnitine treatment in hepatic encephalopathy: view of evidence based medicine Annals of Hepatology Covert hepatic encephalopathy as a multi organ syndrome: the gutlivermusclebrain axis, diagnosis, treatment, and multidisciplinary care Journal of Gastroenterology Springer Nature Link Impaired brain function improved by l carnitine in patients with cirrhosis: evaluation using near infrared spectroscopy Scientific Reports