Carnitine traffic and human fertility ScienceDirect Berberine for PCOS: Benefits and Risks The effects of N acetylcysteine on ovulation and sex hormones profile in women with polycystic ovary syndrome: a systematic review and meta analysis British Journal of Nutrition Cambridge Core L Carnitine: Benefits, Uses, Side Effects, and More L carnitine is a naturally occurring amino acid structure that is made in the human brain, liver, and kidneys. L carnitine plays a critical role in energy production, as it converts fat into energy. The Role of l Carnitine in Mitochondria, Prevention of Metabolic Inflexibility and Disease Initiation