L carnitine for Sperm Motility: Boost Fertility Nanoparticle mediated L carnitine delivery for improved male fertility ScienceDirect PROFORTIL No. 1 proven efficacy in male fertility L carnitine Improves Sperm Parameters, Testosterone, and Luteinizing Hormone Levels in Men with Idiopathic Male Infertility Natural Health Research Treat Male Infertility With 4 Proven Supplements That Support Sperm Health Reproductive Medicine & Infertility Associates Frontiers The Effect of Antioxidants on Sperm Quality Parameters and Pregnancy Rates for Idiopathic Male Infertility: A Network Meta Analysis of Randomized Controlled Trials