L Carnitine Liquid 16 fl oz Lakewinds Vanilla Flavor L Carnitine 1,100mg Liquid Dietary Supplement L Carnitine Before or After Workout Which Is Better for Fat Loss ? Meet L Carnitine a naturally occurring amino acid that plays a key role in helping the body convert fat into usable energy. It works by transporting fatty acids into your cells to Supplements don't replace the workbut they can support it L Carnitine helps your body turn fat into usable energy, so you can push harder and recover better. Consistency first. Supplements second. Results