L Carnitine and Fertility for Women: Does It Help? Nordic Naturals These are my educated supplement choices during pregnancy. I'm not taking a traditional prenatal because this supplement stack more than covers my needs for folate, B vitamins, iron, and other key nutrients What even is carnitine?? Carnitine is a "conditionally" essential amino acid that becomes essential during pregnancy. What does this mean? You must get carnitine through food! The best sources are red NOW Foods L Carnitine 500mg Supplement Giant