ME CFS (Myalgic Encephalomyelitis Chronic Fatigue Syndrome) is a complex condition that can occur after an infection (like the flu, mono, COVID 19, etc.). For some, there's no clear trigger, but regardless, the illness is Targeting Skeletal Muscle Dysfunction With L Carnitine for the Treatment of Patients With Chronic Obstructive Pulmonary Disease In Vivo L Carnitine Tartrate SFI Health US Carnitine: Genetic Variants Affecting Mitochondrial Energy and Health JCI Insight Plasma metabolomics reveals disrupted response and recovery following maximal exercise in myalgic encephalomyelitis chronic fatigue syndrome