Acetyl-L-carnitine is an amino acid that the body produces naturally, explains WebMD. It is useful in improving memory loss, reducing nerve pain and treating the symptoms of male menopause.
Acetyl-L-carnitine helps the body produce energy, according to RxList. The body makes L-carnitine in the liver and the kidneys and stores it in the heart, brain, sperm and skeletal muscles, states the University of Maryland Medical Center.
The body converts L-carnitine to acetyl-L-carnitine, says WebMD. There is evidence that this amino acid helps with Alzheimer's disease, Peyronie's disease, Down syndrome and nerve pain. Individuals who cannot produce enough of the amino acid or who have conditions such as angina that lower the levels of the amino acid can take supplements to boost it.