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9 Ordinary Household Items That Are Destroying Your Thyroid


You think you’re doing “everything right” or “eating healthy,” but you might be hurting your efforts to get and stay well by not paying attention to the harmful effects of the everyday items you use at home.

Your thyroid, a small, butterfly-shaped gland located in your lower neck, has enormous responsibility for your body’s metabolic processes. Specifically, your thyroid releases two primary hormones — triiodothyronine (T3) and thyroxine (T4) — that control metabolism.

Whether they’re synthetic or natural in nature, toxins are a piece of the complex thyroid puzzle.

Tap Water

Almost all of us have perchlorates in our bodies, according to the CDC. Perchlorate is a byproduct of the manufacturing of rocket and jet fuel, car air bags and fireworks. This toxin leaks into much of our drinking water and food supply. The CDC study found widespread perchlorate human exposure, and a connection between perchlorate levels and thyroid hormone levels. Perchlorate prevents the production of thyroid hormone, which can lead to low thyroid symptoms. One study found babies born with elevated levels of thyroid-stimulating hormone may have been affected by small amounts of perchlorate in their mother’s drinking water. These studies, and the work of the Environmental Working Group, show that not only is perchlorate exposure pervasive, but that even low levels of perchlorate exposure can have negative health effects on the thyroid.


Phytoestrogens in soy proteins have been found to inhibit thyroid peroxidase. Soy is able to disrupt normal thyroid function by inhibiting the body’s ability to use iodine, blocking the process by which iodine becomes the thyroid hormones, inhibiting the secretion of thyroid hormone, and disrupting the peripheral conversion of T4 to T3. Researchers have also found that infants fed soy formula had a prolonged increase in their thyroid-stimulating hormone (TSH) levels, compared to infants fed non-soy formulas. Soy is also commonly a genetically modified food (GMO), which adds another variable to consider.


One study found that women married to men who used pesticides in their daily work were at a much higher risk of developing thyroid problems than other women. Another study warns that about 60 percent of pesticides used today may affect the thyroid gland’s production of hormones. Many antifungals and weed killers used on produce have been shown to decrease thyroid function and increase weight-loss resistance.

Flame retardants

Flame retardants, or polybrominated diphenyl ethers (PBDEs), have been found in several studies to disturb thyroid function. Flame-retardant chemicals are found in television and computer screens, as well as in the foam used for furniture and carpeting padding. PBDEs are also found in many Americans, and are linked to behavioral and developmental problems.


Beyond an environmental concern, plastics can also be hazardous to your body’s environment. Antimony, a chemical that leaches from plastic bottles, is one concern. Researchers at the University of Copenhagen found antimony levels in fruit drinks and juices in plastic bottles at levels 2.5 times higher than what’s considered safe in tap water! Phthalates in some plastics have been shown to decrease thyroid function. Bisphenol A (BPA) — also used in plastics, food can coatings, and dental sealants — decreases thyroid receptor site sensitivity, causing thyroid resistance, similar to PCBs.

Non-Stick Products

One study found that perfluorooctanoic acid (PFOA), a chemical used to make Teflon, food wrappers, and other products, can affect thyroid function even at moderate levels of exposure. A study in Environmental Health Perspectives found that higher concentrations of PFOA are associated with the thyroid conditions that are seen today.


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