Leucine is part of the BCAA branched-chain essential amino acid group, which stands out for its oxidation rate higher than valine and isoleucine.

As our body does not produce it, it can be found and ingested through foods such as fish, meat, milk, and egg, among others, and supplements with the amino acid isolated or in whey protein and BCAA.

Of all, leucine is one of the most important, and that's because it is part of a group known as essential amino acids. These substances are even more special precisely because they cannot be produced by the body itself, which means they are obtained through food or supplementation.

Along with other amino acids, valine and isoleucine, it forms a branched chain known to athletes: BCAA. It favours the construction and growth of muscles and is essential to obtain good results in training.


According to the Revista Brasileira de Nutrição Esportiva, the main function of leucine is to carry out the process of protein synthesis in the muscles, as the amino acid has positive results in stimulating the post-workout recovery process, strength, resistance and inhibition of sarcopenia.

In addition, supplementation can contribute to creating new muscle tissues and reducing central fatigue, helping with better performances for those who train with a focus on hypertrophy.

Another function of leucine is related to weight loss, as muscle mass degradation occurs during weight loss, and supplementation can help protect muscles and prevent lean mass catabolism.


One of the products that have gained increasing popularity among physical activity practitioners is l-carnitine.

It is an amino acid produced by the body or consumed via the diet. It transports fatty acids to the mitochondria (the cellular compartment where fatty acids are "burned").

The diet can extract this substance mainly from foods such as meat and animal products; avocado and soy can act as plant sources, but the best source is the meat itself. King Nutrition guarantees the perfect daily dose, so you don't have to worry about including foods that are sources of this amino acid in your diet; thus, it is easier to balance the daily intake with the choice of foods for a healthy routine.


This primarily benefits those who are seeking more health. The gym and bodybuilding trend has become popular, sparking even more interest in l-carnitine. It is not a product discovered recently, which is why its credibility is excellent, as studies on this supplementation and its benefits already have decades of constant evaluation. Since the 1980s, l-carnitine supplementation has been recommended to treat diseases associated with decreased concentrations of this quaternary amine. Some of them are cardiovascular diseases – such as Myocardial Ischemia: angina, acute myocardial infarction (AMI) and heart failure – peripheral arterial disease, kidney diseases, Acquired Immunodeficiency Syndrome (AIDS) and diabetic neuropathy.


It is a supplement that has gained increasing prominence among athletes, primarily because its main function can be used for several modalities, not just for training in the gym. It is one of the main options for athletes of intense aerobic activity, such as swimming, cycling and athletics. Maximum performance is guaranteed with the right products, also used for extreme anaerobic practices. It is a vital amino acid and worth knowing more about its action in the body.

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