Serum L Carnitine Levels Are Associated With First Stroke in Chinese Adults With Hypertension Stroke If you are like a lot of people, you may have never heard of carnitine but this important nutrient is critical for our body's ability to optimally burn fat required for energy. Lypo Spheric Acetyl L Carnitine L Carnitine 3500 Metabolic Nutrition L Carnitine Oral Bioavailability NOW l Carnitine Supplement