The thyroid profile is a precise, comprehensive analysis of thyroid hormone metabolism. It includes central thyroid gland regulation and activity, thyroid production and secretion, peripheral thyroid conversion, and autoimmunity. The thyroid makes hormones that regulate the energy level and that means your brain, heart, lungs, liver, skin, tissues and other body parts depend on your thyroid to stay “powered up” and active, and to remain healthy by generating new cells to replace old ones.