The thyroid is responsible for a number of things in the body to reduce poisons and help get rid of them it also controls wait loss a bad one can make you gain alot of wait then youll have to go on meds to help do the job the thyroid was doing or have it takin outthe tea will help the thyroid do its job if the thyroid is not in to bad of shape the nutrients from the tea help make that job easier to get done

Herbal remedies using Oat straw (Avena sativ, also known as groats):
The use of herbal remedies, including the herb oat straw (also known as groats), classified as Avena sativa, are popular as an alternative to standard Western allopathic medicine for a variety of problems, including under active thyroid, panic attacks, fighting osteoporosis as well as calming hyperactive children. Oatstraw is rich in calcium and magnesium (Oatstraw also contains B-complex vitamins, silicia, calcium, flavones, saponins, and Vitamin A.). It can be used for both physical and nervous fatigue and is helpful for depression, disorders in thyroid function (Oat Straw is useful for thyroid).

Hypothyroidism (Underactive Thyroid)
Hypothyroidism, or an underactive thyroid, occurs when the thyroid stops secreting the needed amount of hormones. Many of the symptoms caused by hypothyroidism can be initially misdiagnosed as many other conditions, or simply getting older. Weight gain, fatigue, a hoarse voice and muscle aches are only a few symptoms of an underactive thyroid. Doctors often prescribe synthetic hormone pills to counter deficiency in natural hormone production. However, green oats (Avena sativa) temporarily soothe nerves and depression associated with an underactive thyroid. All types of oats are good for hypothyroidism.Variations include tonics sold in health food stores; oatstraw tea made from unripe oats; or prepackaged oat bars or cereals. And, of course, hot oatmeal.

Hyperthyroidism (Overactive Thyroid)
When the thyroid produces too many hormones, hyperthyroidism, or overactive thyroid, causes rapid weight loss, tremors, breathlessness and an inability to tolerate heat. Radioactive iodine may be used to kill the overactive thyroid cells. Severe cases require removal of some or all of the thyroid gland. Avoid oats and oat supplements when treating hyperthyroidism, along with sugar, dairy products, wheat and pine nuts. Instead, eat goitrogenic foods, like leafy green vegetables, which lessen the presence of hormone-producing iodine in the body.

Thyroid Maintenance
When the thyroid works normally, TSH (thyroid-stimulating hormone), which regulates T3 and T4 production, tests in the normal range between 0.4 to 5.0. If the T3 and T4 scores are also normal, and you maintain the same weight for long periods of time, you have a healthy thyroid. A well-balanced diet, including a moderate amount of oats--such as those found in breakfast cereals and oatmeal--will keep your thyroid functioning without problems.

The thyroid, a butterfly-shaped endocrine gland located in the front of the neck near the trachea, regulates hormones, metabolism and protein production. Thyroxine (abbreviated as T3) and triiodothyronine (T4), hormones secreted by the thyroid, travel to other parts of the body. When the thyroid malfunctions, changes in the diet may hasten its return to a balanced production. Oats, long considered one of nature's most wholesome foods, are beneficial to the thyroid in many instances.

http://www.ehow.com/about_5709651_oats-thyroid-pro blems.html

What ingredient or property in the oatstraw, has an effect on the thyroid or the production of hormones?