Adding L carnitine to antagonist ovarian stimulation doesn't improve the outcomes of IVF ICSI cycle in patients with polycystic ovarian syndrome: a double blind randomized clinical trial Journal of Ovarian Research Springer Polycystic Ovary Syndrome (PCOS): Symptoms & Nutritional Strategies. Life Extension How L Carnitine Supports Fat Metabolism in PCOS Oana Posts I've been saying this for years L carnitine isn't just some gym supplement, it actually makes a lot of sense for PCOS. For many women with PCOS, poor insulin sensitivity is a major