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. Polycystic Ovary Syndrome (PCOS): Symptoms & Nutritional Strategies. Life Extension Carnitine traffic and human fertility ScienceDirect L Carnitine has become one of the most commonly asked about supplements over the past 18 months and I can see why when looking at all the research that has come out about it over the last 2ish years., L Carnitine Benefits: Enhance Your Weight Loss Journey with This Power Supplement Sova Health