The most common cause of heart disease is narrowing or blockage of the coronary arteries, the blood vessels that supply blood to the heart itself. This is called coronary artery disease and happens slowly over time. It's the major reason people have heart attacks.
Millions of people take thyroid medications like Synthroid®, Levoxyl®, or levothyroxine. These are all forms of the T4 thyroid hormone, i.e., a thyroid hormone molecule containing 4 iodine molecules. Maintaining normal thyroid hormone levels are important for control over metabolic rate and weight control, energy, mood, cholesterol, and…