Chronic oral administration of L carnitine induces testicular injury: in vivo evidence International Urology and Nephrology Springer Nature Link Carnitine: Genetic Variants Affecting Mitochondrial Energy and Health Acetyl L Carnitine Core Nutritionals Frontiers The efficacy of orally administered L carnitine in alleviating ovarian dysfunctions has laid the foundation for targeted in vivo use: a study employing self control and propensity score matching Nanoparticle mediated L carnitine delivery for improved male fertility ScienceDirect