Nutritional Supplements and Complementary Therapies in Polycystic Ovary Syndrome Advances in Nutrition L Carnitine: Benefits, Uses, Side Effects, and More L carnitine Effect, intake, dosage and much more BIOGENA International There's a reason L carnitine keeps showing up in PCOS research Because PCOS is closely tied to insulin resistance, inflammation, and metabolic dysfunctionand L carnitine plays a role in energy metabolism and fat utilization.