Carnitine
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Carnitine as a sports nutrition supplement aids fat metabolism, which is important to endurance athletes and others who work out long and hard. However, it is classed as a nonessential amino acid, which means the body manufactures it from other amino acids. There is a theory that the body does not manufacture enough for strenuous exercise and a carnitine sports nutrition supplement can help.
Studies on supplemental carnitine for increasing performance are inconclusive, but there is no sound evidence that including it in a sports nutrition diet can help athletic performance, and it has little value for weight loss.
If you want to try it anyway, make sure it's L-carnitine. D-carnitine can be dangerous. Follow instructions on the label.
