L Carnitine Liquid 3000 mg, 16 oz. NOW Foods Fruitful Yield 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 AcetylLcarnitine suppresses thyroid hormoneinduced and spontaneous anuran tadpole tail shortening Hanada 2013 Hereditas Wiley Online Library Adding L Carnitine and Selenium to Methimazole in Graves' Disease: A Prospective Randomized Trial on Thyroid Markers and Quality of Life L Carnitine Arazo Nutrition