Liquid L Carnitine 3000: Metabolism & Energy Support Cutler Nutrition Did you know L carnitine, a vital amino acid, is naturally produced by your body and found in various foods? While acetyl L carnitine (ALCAR) can be a beneficial supplement for some, most people get Serum L Carnitine Levels Are Associated With First Stroke in Chinese Adults With Hypertension Stroke Usefulness of Carnitine Supplementation for the Complications of Liver Cirrhosis 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.