According to research recently reported on in the journal Hormone and Metabolic Research
, the rate of depression is much higher in people who are hypothyroid than in the general population.
The 254 patients studied were hypothyroid after radioiodine (RAI) treatment for hyperthyroidism, or after surgical removal of the gland after thyroid cancer. According to the researchers, people who had normal thyroid levels, or who were hyperthyroid did not show evidence of mental health disturbances. Hypothyroidism, however, had a significant
impact, dramatically increasing the risk for what they termed "critical mood deterioration." The researchers concluded that "hypothyroidism represents a widely underestimated functional condition that may severely affect mental health."
Read more now about Thyroid Disease and Depression
Source: Larisch, et. al., "Depression and anxiety in different thyroid function states." Hormone Metab Res, 2004;36(9):650-653.