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Carnitines and male infertility.
1Department of Obstetrics and Gynecology, The Cleveland Clinic Foundation, 9500 Euclid Avenue, Desk A19.1, Cleveland, OH 44195, USA. agarwaa@ccf.org
Reproductive Biomedicine Online
|May 20, 2004
Summary
L-Carnitine (LC) and acetyl-L-carnitine (ALC) show promise for improving sperm concentration and count in men with infertility. However, more rigorous studies are needed to confirm their effectiveness.
Area of Science:
- Reproductive Medicine
- Biochemistry
- Andrology
Background:
- L-Carnitine (LC) and acetyl-L-carnitine (ALC) are vital for sperm metabolism and maturation in the epididymis.
- These compounds possess antioxidant properties and are linked to sperm motility.
Purpose of the Study:
- To review the roles of LC and ALC in male reproduction.
- To evaluate the benefits and limitations of LC and ALC in treating male infertility.
Main Methods:
- Review of existing scientific literature and clinical trials on carnitine supplementation for male infertility.
- Analysis of studies investigating the effects of LC and ALC on sperm parameters.
Main Results:
- Evidence suggests daily doses of at least 3g of LC and/or ALC can improve sperm concentration and total sperm counts in men with astheno- or oligoasthenozoospermia.
- Many studies lack rigorous placebo-controlled, double-blind designs, limiting definitive conclusions.
Conclusions:
- LC and ALC demonstrate potential benefits for specific cases of male infertility, particularly those with poor semen quality.
- Further well-designed clinical trials are essential to validate the efficacy of carnitines in male infertility treatment.