Exome sequencing identifies primary carnitine deficiency in a family with cardiomyopathy and sudden death European Journal of Human Genetics What is L Carnitine? L Carnitine is a naturally occurring amino acid derivative that the human body can synthesize itself. It is mainly found in red meat and dairy products. [1] Core Benefits of L Carnitine is Underrated. New Meta Review Reminds Us Why. Acetyl L Carnitine Allergy: Symptoms and Treatment Options (2026) Wyndly L Carnitine Fumarate with Biosint Carnitine, 60 Veggie Caps (500 mg per Veggie Cap) Targeting Skeletal Muscle Dysfunction With L Carnitine for the Treatment of Patients With Chronic Obstructive Pulmonary Disease In Vivo