Association between fatigue, peripheral serotonin, and L carnitine in hypothyroidism and in chronic fatigue syndrome American ME and CFS Society Hashimoto's Thyroiditis: The Destructive Thyroid Disease That Slows You Down The Wellness Way A Functional Nutrition Approach to HASHIMOTO'S THYROIDITIS Functional Health Research + Resources Made Whole Nutrition Hashimotos Thyroiditis: Natural & Nutritional Therapy Organics L carnitine reduces hyperthyroidism symptoms If you are like a lot of people, you may have never heard of carnitine but this important nutrient is critical for our body's ability to optimally burn fat required for energy.