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Pesticides Can Cause Thyroid Dysfunction

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Hypothyroidism is a very common condition that refers to any state in which a person's thyroid hormone production is below normal. Increased cholesterol levels, depression, fatigue, hair loss, memory loss, dry, rough skin, and constipation can be observed in hypothyroidism.

There are several disorders that result in hypothyroidism e.g. autoimmune disorders, thyroid removal, prescription medications, pituitary disease and iodine deficiency. But a study reveals that higher exposure to the insecticide aldrin was positively associated with subclinical hypothyroidism among the male pesticide applicators. The study also found that higher exposure to the herbicide pendimethalin was associated with subclinical hypothyroidism.

The study also concluded that fumigant methyl bromide was inversely associated with TSH and positively associated with T4. This study suggests that long-term exposure to aldrin, pendimethalin and methyl bromide may alter thyroid function among male pesticide applicators.


Lerro C.C., et al., 2017, “Occupational pesticide exposure and subclinical hypothyroidism among male pesticide applicators,” Occupational & Environmental Medicine; doi: 10.1136/oemed-2017-104431. [Web Reference]

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