Acetyl L carnitine is a form of the amino acid L carnitine, which helps turn fat into energy and occurs in the body naturally. It is thought to help slow down the ageing process L Carnitine Sperm Health Conceive Plus Male Fertility Supplement With L Carnitine And L Arginine, Preconception Fertility Formula For Optimal Count & 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 traffic and human fertility ScienceDirect