l carnitine coenzyme q10 astaxanthin Q10, L-Carnitine, Astaxanthin, Lycopene & Zinc Tablets L-Carnitine, Coenzyme Q10, Zinc Sulphate,

Production declines with age

Hum Reprod update

Due to high concentration of L-carnitine in epididymis and its potential in stabilizing sperm plasma membrane and increasing sperm survival, and reduction of sperm intracellular L-carnitine level following cryopreservation, (77) some studies have suggested that adding L-carnitine to cryomedium can compensate its loss in sperm cell and improve sperm parameters during freeze-thaw process

(PubMed) US Department of Health & Human Services, National Heart Lung and Blood Institute

However, a meta-analysis found no significant difference in SDF levels in infertile men following AOX supplementation as compared to placebo or no treatment (100)

Less common adverse effects have included pruritic rash, muscle weakness in uremic patients, and seizures in patients with seizure disorders