PCOS Nutrition Center L Carnitine (120 Capsules) PDF) The effect of adding l carnitine to induction of ovulation with letrozole among pcos patients 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., PCOS Nutrition Center L Carnitine (120 Capsules) PCOS Nutrition Center