Frontiers Dietary supplements in polycystic ovary syndromecurrent evidence L Carnitine has a range of benefits for women with PCOS but, a new study set out to look at carnitine's impact on some of PCOS key indicators. One of those benefits reported Polycystic Ovary Syndrome (PCOS): Symptoms & Nutritional Strategies. Life Extension L Carnitine Benefits, Uses, Dosage, Foods, Side Effects Dr. Axe L Carnitine: Benefits, Side Effects, FAQ, Sources, and Dosage