Do iodine supplements help with cognitive development?

Iodine is required for the production of thyroid hormones, which are necessary for normal brain development and cognition. In children, prolonged iodine deficiency leads to learning disabilities, a lower intelligence quotient (IQ), and poor motivation to achieve. There is evidence that iodine supplementation improves perceptual reasoning, information processing, fine motor skills, and visual problem solving in iodine-deficient children. For this reason, it is important for pregnant and lactating women, as well as children, to have sufficient iodine intake.

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