Recent Research Identifies Dietary Risks and Benefits for Optimal Thyroid Health

It has long been known that diet and nutrition play a major role in determining thyroid health. Without iodine, a vital mineral, the thyroid cannot function properly. In the days before table salt was supplemented with iodine, deficiencies resulted in widespread cases of goiters. This is still a health risk in many developing nations.

But several studies that have been completed in recent months have identified other nutritional substances that can impact thyroid health, both negatively and positively. This week, we’ll review dietary guidelines to help you make positive food choices to promote healthy thyroid function.

Studies Offer Contradictory Results on Green Tea’s Impact

Over the last several years, green tea has made significant inroads in Western countries such as the United States. Long a dietary staple throughout much of Asia, this mild tea has been linked with a wide variety of health benefits ranging from cancer prevention to immunity enhancement.

Dieters and those looking to maintain a healthy weight have been particularly drawn to green tea. The tea is said to have metabolic benefits, helping to prompt the fat-burning processes that can help speed weight loss. However, for thyroid patients, this benefit could prove to be problematic.

For hyperthyroid patients who suffer from overactive thyroids, green tea consumption in large quantities is often not recommended. This is due to concerns that the metabolism-boosting properties of green tea could prove to increase the rate of the metabolism too much, exacerbating some of the symptoms of hyperthyroidism.

Somewhat surprisingly, studies that have assessed the ability of green tea to boost the metabolisms of hypothyroid patients have been inconclusive. At the current juncture, no conclusive recommendation for green tea consumption by hypothyroid patients has been issued. However, until more definitive findings are achieved, it may be best to limit green tea consumption if you have a history of any kind of thyroid disorder.

Iodine Fortification Policies Questioned

Since the mid-twentieth century, table salt has been fortified with iodine in order to prevent goiters and other thyroid disorders. In the United States, public health experts assert that this policy has prevented millions of illnesses over the course of the last several decades.

Health advocacy organizations have emphasized the importance of ensuring adequate iodine intake in developing nations. However, a 2006 study undertaken in China called this widespread assumption into question. It was found that excessive iodine intake is linked to a host of other thyroid problems.

Most significantly, rates of hypothyroidism and autoimmune thyroiditis were elevated among the population of Chinese subjects, and in both cases, excessive consumption of iodine was believed to be the culprit. However, the researchers pointed out that iodine deficiency, rather than overdose, remains the more pressing problem in most part of the world.

Fluoride: Good for Teeth, Bad for the Thyroid Gland?

Like iodine, fluoride is a chemical compound that has been deliberately added to our food supply in the service of a number of public health goals, such as improving the overall quality of dental health and reducing the risk of dental cavities. In many states and municipalities, fluoride is added to the drinking water supply. In addition, most toothpaste also contains added fluoride.

However, in recent years, a number of studies have found a link between fluoride intake and thyroid dysfunction. This is not surprising, considering the fact that fluoride was long used as a leading treatment of under-functioning thyroids in hospitals and clinics throughout Europe. In communities whose water supplies are heavily fluoridated, the daily intake of the compound is roughly equivalent to the doses that were once used by European physicians to inhibit thyroid function in patients with hyperthyroidism.

At the current juncture, no definitive statement recommending that thyroid patients avoid fluoride consumption has been released. However, several leading medical groups have issued statements recommending further investigation of the possible impact of fluoride consumption on not only the thyroid gland, but also the entire endocrine system.

In the interim, it may be best for patients with hyperthyroidism to switch to an all-natural, non-fluoridated toothpaste, and to filter drinking water to eliminate some fluoride. This is a decision that is best made through consultations with your dentist and physician.

Whether your thyroid is underactive or overactive, or whether you are simply trying to maintain optimal thyroid function, it is important to remember that what you consume can affect your health in many different ways. Check back for more research news that will help you make choices that will promote thyroid health.