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Researchers have known for decades about leucine, but new research has cast new light on the broader health and amino acids. Much of the benefits of the protein may be attributable to leucine due to its ability to stimulate protein synthesis, helps turn the switch on the body for muscle building area.

Leucine is an essential amino acid, this means that our bodies can not produce and must get food intake. Leucine is the most abundant of the three branched-chain amino acids (BCAAs) in the muscles (the others are isoleucine and valine). BCAAs make up a large proportion of muscle amino acids. They are the only amino acids used as fuel by the muscles, therefore the plasma levels of BCAAs disminullen after exercise.

In the past, researchers have viewed them simply as the bricks necessary to build a house. In the case of leucine, recent research has shown that this amino acid has several features that go far beyond simply providing the material for building muscle.
If you are interested in building more muscle mass and prevent the loss of it due to aging, stimulate protein synthesis is the key. Most people know that eating protein induces an increase in muscle protein synthesis, as protein supplements are very popular and are consumed after exercise. Now researchers are refining their knowledge about why the protein stimulates the muscle. Scientists have shown that the amino acid level in the blood that directly influences the synthesis of proteins. In particular, the amino acid leucine is more related to protein synthesis. It produced a series of experiments. We examined directly the muscle protein synthesis after feeding of various formulations of amino acids with glucose ingestion. When nonessential amino acids were consumed not noticed a stimulation of protein synthesis in contrast to when BCAAs were consumed, that if I increase the protein sisntesis, but when it accounted for only leucine, protein synthesis increased significantly. These results provided strong evidence that leucine is the driving force behind the ability to stimulate muscle mass.

A series of cellular studies have clearly demonstrated that leucine directly activates a compound in the muscle called mTOR. It turns out that the mTOR pathway is a molecular switch that activates the muscle machinery that makes proteins, and leucine is one of the main activators of mTOR. Therefore, leucine not only provides the building blocks for the synthesis of proteins, but also plays a critical role in regulating this process. Even when excess amino acids are available to provide building materials for new muscle, adding leucine increases the rate of protein synthesis. The conclusion is that the addition of extra leucine to the diet is an effective strategy to maximize muscle after exercise.

A number of studies have shown that high protein diets help weight loss. Researchers at the University of Wisconsin conducted studies that examined weight loss diets that contain 10 grams of leucine in a total of 125 grams of protein per day, with a minimum of 2.5 grams of leucine at each meal. In two separate studies, groups of high intake of leucine had lost more weight, increased fat loss and better preservation of lean muscle mass. In these studies, high concentrations of leucine also resulted in better glucose control. In another study, scientists at Columbia University studied mice that were fed a high-fat diets. Supplements were administered leucine, its weight in fat decreased by 25%. Leucine also promoted a decrease in blood glucose and LDL "bad." Leucine increase your resting metabolism by boosting levels of UCP3 (protein separation 3), which causes the body to lose energy as heat instead of storing it as fat. How much do you need? The ideal amount of leucine to take is a matter of debate. The intake of only 2.5 grams of leucine stimulates protein synthesis. In long-term studies, leucine intake equivalent to 8 grams per day in divided doses is recommended so that at least 2.5 grams of leucine consumed at each meal.