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 Injectable vs Oral L Carnitine: Which Works Better? AWP I'm often met with surprise when I mention creatine and L carnitine rather than just calcium for injury prevention in perimenopause & menopause. As estrogen declines, our bodies experience significant metabolic shifts in L carnitine improves polycystic ovary syndrome by increasing CYP11A1, estrogen receptor, and decreasing XNIP and VEGF expression Naunyn Schmiedeberg's Archives of Pharmacology Springer Nature Link