L-amino acids are molecules often referred to as the "building blocks of protein" due to their structural importance in forming proteins essential for your body's functions. L-amino acids can be found in foods and are also available as dietary supplements. There are numerous types of L-amino acids, and each offers distinct benefits. Although supplementation of L-amino acids can be beneficial, consult a doctor prior to taking these or any other supplements.
L-arginine
L-arginine is an amino acid popular among athletes, as some research indicates it can improve body composition. According to the July 2010 issue of the journal "Amino Acids," supplementation of L-arginine can enhance fat loss and promote increased muscle mass gain.
L-carnitine
L-carnitine is an amino acid often found in weight-loss products, as it is involved in turning food into usable energy. According to research published in the July 2010 edition of "Endocrine Journal," L-carnitine supplementation can increase weight loss and reduce insulin resistance, a condition in which your body can't properly process food you consume. Insulin resistance can lead to diabetes and obesity.
L-leucine
L-leucine is an amino acid commonly found in protein supplements and recovery products. L-leucine may help promote muscle building, and, according to research published in the June 2010 edition of "Muscle & Nerve," may help you retain muscle mass during periods in which you are not exercising.
L-valine
While many L-amino acids offer benefits related to exercise and fitness, these molecules have a number of other advantages as well. For example, research published in the February 2010 issue of the "Tohoku Journal of Experimental Medicine" found that L-valine supplementation reduced liver fibrosis, a damaging condition triggered by liver disease. The researchers suggested that L-valine might be beneficial in treating liver cirrhosis.
References
- "Amino Acids"; Beneficial Effects of L-Arginine on Reducing Obesity: Potential Mechanisms and Important Implications for Human Health; J.R. McKnight et al.; July 2010
- "Endocrine Journal"; Orlistat and L-Carnitine Compared to Orlistat Alone on Insulin Resistance in Obese Diabetic Patients; G. Derosa et al.; July 2010
- "Muscle & Nerve"; Leucine Attenuates Skeletal Muscle Wasting via Inhibition of Ubiquitin Ligases; I.L. Baptista et al.; June 2010
- "Tohoku Journal of Experimental Medicine"; Treatment with L-Valine Ameliorates Liver Fibrosis and Restores Thrombopoiesis in rats exposed to Carbon Tetrachloride; C. Nakanishi et al.; February 2010
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