Many different herbs may be helpful in supporting thyroid function.

I agree with Dr. Abbassian in principal about diet and exercise. They (diet and exercise) are not treatments per se' for thyroid disorders. There are dietary changes that one can make that will make big differences in your treatment effeciency.
Many food are considered "Goitrogenic", meaning they can cause a goiter or affect thyroid function in an ndividual with thyroid disease. The following is a guide to some "goitrogenic" foods.

Goitrogens are naturally-occurring substances that can interfere with function of the thyroid gland. Goitrogens get their name from the term "goiter," which means an enlargement of the thyroid gland. If the thyroid gland is having difficulty making thyroid hormone, it may enlarge as a way of trying to compensate for this inadequate hormone production. "Goitrogens," like circumstances that cause goiter, cause difficulty for the thyroid in making its hormone.

Foods that contain goitrogens

There are two general categories of foods that have been associated with disrupted thyroid hormone production in humans: soybean-related foods and cruciferous vegetables. In addition, there are a few other foods not included in these categories - such as peaches, strawberries and millet - that also contain goitrogens. The table below shows a list of some foods that contain goitrogens.

Soybean-related foods

Included in the category of soybean-related foods are soybeans themselves as well as soy extracts, and foods made from soy, including tofu and tempeh. While soy foods share many common ingredients, it is the isoflavones in soy that have been associated with decreased thyroid hormone output. Isoflavones are naturally-occurring substances that belong to the flavonoid family of nutrients. Flavonoids, found in virtually all plants, are pigments that give plants their amazing array of colors. Most research studies in the health sciences have focused on the beneficial properties of flavonoids, and these naturally-occurring phytonutrients have repeatedly been shown to be highly health-supportive.

The link between isoflavones and decreased thyroid function is, in fact, one of the few areas in which flavonoid intake has called into question as problematic. Isoflavones like genistein appear to reduce thyroid hormone output by blocking activity of an enzyme called thyroid peroxidase. This enzyme is responsible for adding iodine onto the thyroid hormones. (Thyroid hormones must typically have three or four iodine atoms added on to their structure in order to function properly.)

Cruciferous vegetables

A second category of foods associated with disrupted thyroid hormone production is the cruciferous food family. Foods belonging to this family are called "crucifers," and include broccoli, cauliflower, Brussels sprouts, cabbage, mustard, rutabagas, kohlrabi, and turnips. Isothiocyanates are the category of substances in crucifers that have been associated with decreased thyroid function. Like the isoflavones, isothiocyanates appear to reduce thyroid function by blocking thyroid peroxidase, and also by disrupting messages that are sent across the membranes of thyroid cells.

Examples of foods that contain goitrogens
Cruciferous vegetables including:
Broccoli
Brussel sprouts
Cabbage
Cauliflower
Kale
Kohlrabi
Mustard
Rutabaga
Turnips
Millet

Peaches

Peanuts

Radishes

Soybean and soy products, including tofu

Spinach

Strawberries

Now, the good news: If these vegitables are cooked, it decreases the effect that it has on the thyroid. It doesn't eliminate the effect, but does make it safer.

For more information, request the nutritional booklet from www.fittfactorseven.com