L Carnitine Benefits Patients with Hypothyroidism Natural Health Research Supplements and Thyroid Health: What to Know L Carnitine Pills for Weight Loss: Evidence, Safety and UK Guidance Bolt Pharmacy Altered carnitine acylcarnitine profiles in levothyroxine treated congenital hypothyroid patients with fatigue: An LC MS MS based study from Bangladesh PLOS One How Thyroid Supplements Work & Why They Help you Feel Better 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.