Full article: Acetyl L carnitine: from a biological curiosity to a drug for the peripheral nervous system and beyond Acetyl L Carnitine: Benefits, Forms, Dosing, and Side Effects Dr Brad Stanfield 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. Carnitine supplementation improves metabolic flexibility and skeletal muscle acetylcarnitine formation in volunteers with impaired glucose tolerance: A randomised controlled trial eBioMedicine