JCI Insight COVID 19 infection alters kynurenine and fatty acid metabolism, correlating with IL 6 levels and renal status L Carnitine, 500 mg, 60 Vegetarian Capsules L CARNITINE 21000mg Support Fat Metabolism & Workout Energy oxyenergy Endothelial dysfunction is common in both Long COVID and ME CFS and has been linked to symptoms like fatigue, chest pain, and brain fog. Research suggests that certain supplementslike L arginine, CoQ10, curcumin, and Metabolic Nutrition, L Carnitine 3500 , Frozen Orange Pop Alpha Lion Burn20 31 Servings Fiery Punch