L Carnitine, 100 Tablets L carnitine 3000 Fat Burner By Nutrakey Get Yok'd Nutrition Amazon.com: Nutrex Research L Carnitine 3000 Clinically Dosed L Carnitine Liquid for Energy, Metabolism & Muscle Recovery Delicious Sour Gummy Worms Flavour No Sugar, No Carbs, No Stimulants 31 Thyroid Supplement with L Carnitine for Cats Only Natural Pet Oxyenergys L Carnitine. My go to pre post workout supplement. Pre workout I usually take it before my workout session for energy production. Post workout Ill take it the day after my workout