How Does Carnitine Support Hashimoto's? Dr. Izabella Wentz L Carnitine For Women With PCOS Does It Help? Andy The RD PCOS Nutrition Center L Carnitine (120 Capsules) L Carnitine has become one of the most commonly asked about supplements over the past 18 months and I can see why when looking at all the research that has come out about it over the last 2ish years., Comparison of short term and long term effects of peroral L carnitine intake: clinical implications of elevated TMAO levels in cardiovascular complications