How Much L Carnitine for Male Fertility? The 101 Guide Carnitine traffic and human fertility ScienceDirect When preparing to start a family, male reproductive health is just as relevant as female reproductive health, and it is worth addressing both with the same level of intention. FertilAid Multivitamin for L Carnitine for PCOS: Everything You Need to Know PCOS Nutrition Center 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.