Iodine is important in the formation of thyroid hormones. Essential to the cells of the body and brain. The growing normally. The baby is in the womb until the age of two years if iodine deficiency can cause brain not fully grown. Reduced intelligence Or level of intelligence (IQ) of children up to the 10-15 children with learning problems. And the impact on growth Iodine deficiency is a serious disease and neck, or goiter.