Propionyl L Carnitine for Erectile Dysfunction L Carnitine and Testosterone Therapy for Men Men's Clinics L Carnitine: Benefits, Uses, Side Effects, and More Govinda Lifecare What Is CoQ10 and L Carnitine, and How Can It Change Your Life? iThrive Essentials L carnitine helps transport fatty acids into the mitochondria, where they are used to produce energy, supporting fat metabolism and overall energy levels.