Hypothyroidism: Symptoms, Causes and Support Strategies 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. Does L Carnitine help manage hyperthyroidism symptoms? Consensus Can Acetyl L Carnitine Help Clear Brain Fog and Fatigue in Long COVID and ME CFS? RTHM Hypothyroidism: Symptoms, Causes and Support Strategies