Capsules contain no synthetic D-Carnitine or DL-Carnitine. D-Carnitine and DL-Carnitine are less effective than L-Carnitine. D-Carnitine and DL-Carnitine are not recommended because of their adverse physical side effects.

L-Carnitine boosts energy, which in addition to converting body fat to fuel will elevate certain enzymes needed to metabolize sugars, starches, and other carbohydrates. Athletes and casual exercisers can benefit from L-Carnitine supplementation because it reduces the accumulation of lactic acid, which is responsible for the "burn" felt inside the muscles. This may enable exercisers to "gain" without the "pain", as one study confirmed. It is useful in clearing the bloodstream of ammonia and aids in creating glycogen, used to store essential glucose.

It has been used in connection with angina, attention deficit-hyperactivity disorder, congestive heart failure, heart attacks, and intermittent claudication. L-Carnitine can help to prevent muscle atrophy. Anyone suffering from a severe degenerative disease, such as cancer may benefit from carnitine supplementation.

Cardiomyopathy, a disease of the heart muscle, becomes a distinct possibility for those suffering from L-Carnitine deficiency. This amino acid protects the heart from damage when a heart attack or a spasm cuts off the oxygen supply, especially taken in conjunction with Taurine, and Life Sources’ OPC-165™.

Low thyroid function may indicate a need for L-carnitine to help overcome low energy levels and the tendency to gain weight. Kidney dialysis drains the supply of amino acids, causing weak and tired conditions and can be threatened by high triglycerides.