L-Carnitine and Acetyl-L-Carnitine alone have been shown to support improved count, concentration, motility and morphology, as well as to protect sperm, which are particularly susceptible to free radical damage.* "Approximately, 30-80% of infertility cases are caused by oxidative stress and decreased level of seminal total antioxident capacity." In addition to Carnitine, Total Fertility Advantage for Men includes potent antioxidents and essential trace elements like Coenzyme Q10, Zinc, Vitamin C, N-Acetyl Cysteine (NAC), Lycopene, and Selenium for optimal reproductive health.* Total Fertility Advantage for Men contains 400mcg of Folate which has been shown to improve sperm concentration, and when combined with Zinc, also shows improvement in sperm morphology.*
Furthermore, if MSG effects occur on hypothalamus and GnRH-producing cells, the serum level of GnRH will be remarkably reduced
PMID: 26828774
While carnitine doesnt have the same breadth of research to back its efficacy and safety as creatine does, there is still some clinical evidence for its long-term safety
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Depletion Some individuals require supplemental L-carnitine to maintain normal metabolism