Endometriosis 101

Estrogen dominance, which is the root cause of endometriosis, has also been linked to hypothyroidism or thyroid dysfunction. Both Dr. John Lee and Dr. Elizabeth Smith have seen successful restoration of the thyroid by use of natural progesterone and avoiding xenoestrogens and phytoestrogens
Why Do Hypothyroid Symptoms Disappear with Progesterone?
Dr. John Lee believes that thyroid hormone and estrogen actually oppose each other. Estrogen causes food to be stored as fat. While the thyroid hormone causes fat to be burned as energy. Patients with normal thyroid hormone levels measured by laboratory tests have symptoms that suggest they have hypothyroidism. When these same patients are given progesterone which is known to oppose estrogen their hypothyroid symptoms ceased. This implies that too much estrogen in the body, estrogen dominance, interferes with thyroid hormone action.