L Carnitine Liquid 3000 mg, 16 oz. NOW Foods Fruitful Yield Lifestyle Interventions to Tackle Cardiovascular Risk in Thyroid Hormone Signaling Disorders 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 Adding L Carnitine and Selenium to Methimazole in Graves' Disease: A Prospective Randomized Trial on Thyroid Markers and Quality of Life Insight into the metabolic shifts in Graves' hyperthyroidism: a study of acylcarnitine and lipid profiles in: European Thyroid Journal Volume 14 Issue 3 (2025)