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. Acetyl L Carnitine Core Nutritionals Acetyl L Carnitine Mark Hyman, MD Carnitine: Genetic Variants Affecting Mitochondrial Energy and Health Acetyl L Carnitine: Turn Fat Into Energy and Boost Brain Health