L-Carnitine is a naturally occurring amino-acid–like compound that plays an important role in energy production inside the body.

Its main function is to help transport long-chain fatty acids into the mitochondria, which are known as the “powerhouses” of the cell. Once inside the mitochondria, these fatty acids can be used as fuel to produce energy.

In simple terms, L-Carnitine helps the body use fat as an energy source, especially during physical activity, dieting, or periods of increased energy demand.

L-Carnitine is commonly used in sports nutrition because it may support:

Fat metabolism Energy production Exercise performance Muscle recovery Reduced fatigue Better endurance during training Support for cardiovascular function

It is also naturally found in foods, especially animal-based foods such as red meat, fish, poultry, and dairy products. The body can also produce small amounts of L-Carnitine from the amino acids lysine and methionine, with help from vitamins and minerals such as vitamin C, B6, niacin, and iron.