This is a very balanced thyroid support formula with iodine and all the co-factor minerals needed to help it be properly absorbed and become active. What makes this product effective and sets it apart from other thyroid formulas is the extra support for the pituitary and the para-thyroid glands. These glands all work together for healthy endocrine balance and our naturopaths have found the best success if all the weak endocrine glands are addressed simultaneously.