L-Carnitine is naturally synthesized in the body from the amino acids lysine and methionine. It works in two main ways, fat loss and muscle increase.

Fat Burning: L-Carnitine transfers the long chain fatty acids in your body to be oxidized and converted into energy. It has also been shown to reduce fatigue and suppress the appetite. Carnitine discourages your body from storing fat and increases your aerobic capacity, therefore helping you to burn more calories.

Muscle Mass: Increases strength and gains.

Endurance: Increasing your aerobic capacity will give you longer workout sessions and increased endurance.

Brain Function: Helps protect from age related and stress related damage to the brain.

Bone Mass: Slows down the bone loss process and improve bone micro structural properties by decreasing bone turnover.

Diabetes: Helps diabetics by increasing glucose oxidation, glucose storage, as well as glucose uptake.

Immune System: L-Carnitine serves as an antioxidant that can help prevent damage done to your healthy cells by free radicals. This will boost the immune response and can be a plus when training, as one would not have to deal with the occasional cold or allergies.