The thyroid is very susceptible to damage by toxins. The rates of thyroid cancer have doubled in the last 10 years, and hypothyroidism is increasing at alarming rates. Hypothyroidism can have profound affects on the developing brain. Research has found that women diagnosed with hypothyroidism are 4 times more likely to have a child with autism. Many autistic children are diagnosed with hypothyroidism themselves. Symptoms include developmental delay, anxiety, depression, allergies, cold intolerance, sleep disturbance, gastrointestinal issues, and trouble with weight gain/loss, just to name a few. Many children see dramatic improvement when their thyroid is treated, which can be done through medication, proper diet and the avoidance of toxins.
More information can be found on The Thyroid Autism Connection.