Didn't another study show carnitine was good for the heart? l Carnitine Supplementation in Recovery after Exercise L carnitine reduces hyperthyroidism symptoms Thyroid medication use as an assisted bodybuilder should be approached with caution and based strictly on individual neednot just because it's what you do during prep. Too often, both competitors and non competitors L Carnitine and Levothyroxine: A Critical Interaction Warning Anabolic Planner What is the recommended adjustment for Synthroid (levothyroxine) dosage in a pregnant woman with pre existing hypothyroidism?