Action of Thyroid Hormones, T3 and T2, on Hepatic Fatty Acids: Differences in Metabolic Effects and Molecular Mechanisms The most common cause of hypothyroidism worldwide is insufficient intake of iodine, a mineral found in iodized salt and some foods (such as seafood and dairy) that is needed for production of L Carnitine is Underrated. New Meta Review Reminds Us Why. Thyroid Glandular Supplements Benefits From NationalNutrition.ca National Nutrition Articles