O2 Pure L Carnitine transfers long chain fatty acids, such as triglycerides into mitochondria, where they may be oxidized to produce energy. In other words L Carnitine helps our body to use fat as Berberine and L Carnitine: Safety, Benefits and Dosage Guide Bolt Pharmacy Amazon.com: Seeking Health Acetyl L Carnitine Acetyl L Carnitine Supplement Supports Energy, Healthy Fat Metabolism, & Memory Health 500 mg, 90 Capsules : Health & Household L Carnitine LS3 3000 Concentrated Liquid Fat Burner And Metabolism Activator : Target