Memory Problems
Thyroid hormones play an important part in the growth and development of the brain. Therefore, a deficiency of iodine may affect the brain and cause some memory issues. You would find it harder to remember things and learn. Studies have shown that people with high levels of thyroid hormone tend to perform better on memory and learning tests compared to those who lack iodine. Indeed, the area of the brain called the hippocampus, which is responsible for long-term memory, seems to be smaller in those with low levels of thyroid hormones. [8]
