L-Carnitine is not an amino acid in the strict sense (it is not used as a neurotransmitter or in protein synthesis). However L-Carnitine bears many resemblances to amino acids and is usually grouped under this heading. L-Carnitine (the "L" refers to its chemical polarity) is used by the body to transport long-chain fatty acids to the mitochondria in your cells, where they are burned for energy. Since this fat burning is such a major source of muscular energy, deficiencies in L-Carnitine are manifested as low energy levels and muscular weakness. L-Carnitine deficiencies can also appear as mental confusion or cloudiness, angina (heart pain) and weight gain. The Answer is Triple Strength L-Carnitine+CoQ10! If you aren't burning fat, you must be storing it. This obviously leads to a variety of health problems, including fatty build-ups, especially in the heart and liver (more likely to occur if you are a regular consumer of alcoholic beverages).