Reproductive Biology and Endocrinology volume 14 , Article number: 84 Cite this article. Metrics details. There are reports showing that l-carnitine alone or in combination with other micronutrients improve sperm parameters. However, comparative studies are still lacking. This study was carried out to compare the short term effects of a combination of eight micronutrients including l-carnitine vs.

Acetyl-L-carnitine has important roles for male fertility as it is naturally found in human sperm and seminal fluid. Acetyl-L-carnitine is found in high concentrations in the epididymis, a coiled segment of the spermatic ducts that serves to store, mature and transport spermatozoa between the testis where they are made and the vas deferens, before they leave the body. Low carnitine levels are linked with reduced sperm count, or oligospermia, and poor sperm motility. Acetyl-L-carnitine is deficient in infertile semen and sperm samples. Propionyl-L-carnitine is an amino acid that is naturally produced in the body, and it is related to acetyl-L-carnitine. Amino acids are the building blocks that form proteins. This particular amino acid is critical to providing fatty acids to the mitochondria in each cell to fuel energy production.

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