The symptoms are wide ranging, with most notable being thyroid dysfunction, and have been documented by many including Nancy Adams, PhD who offers a collection of links and information on the subject at her site http://quackcenter.com There has also been extensive research on iodine deficiency by Dr. Guy Abraham, the inventor of Iodoral, the strongest iodine supplement available. Believe it or not there is a minimum recommended intake of Iodine by the FDA which is about 1/1000 of what you find in the typical Japanese diet.
I've included a related link to her page which has tons of information about Iodine.
The goitre is used as a biological marker for iodine deficiency. Goitre manifestation indicates that other damaging effects of iodine deficiency are already present.
iodine
A deficiency of iodine causes the disease goiter.
Dwarfism is zinc deficiency. hypothyroidism is iodine deficiency.
HUSAIRA is the scientific name of iodine. The deficiency disease of iodine is Goitre.
HUSAIRA is the scientific name of iodine. The deficiency disease of iodine is Goitre.
Deficiency of iron will lead to anemia while lack of iodine leads to thyroid problems.
A deficiency in the element Iodine in the diet.
Goitre is the major disease caused by deficiency of iodine.
Who suggested that iodine could be added to salt
iodine
Iodine deficiency is especially important in women who are pregnant or nursing their infants. Severe iodine deficiency in the mother has been associated with miscarriages, stillbirth, preterm delivery, and congenital abnormalities in their babies. Children of mothers with severe iodine deficiency during pregnancy can have mental retardation and problems with growth, hearing, and speech. In the most severe form, an under active thyroid can result in cretinism (a syndrome characterized by permanent brain damage, mental retardation, deaf mutism, spasticity, and short stature), though this is not seen in the United States. Congenital hypothyroidism due to iodine deficiency is the most common preventable cause of mental retardation in the world. Even mild iodine deficiency during pregnancy, which may be present in some women in the United States, may be associated with low intelligence in children. 1 SYMPTOMS Page 1 of 3 1 What is iodine deficiency? Iodine is an element that is needed for the production of thyroid hormone. The body does not make iodine, so it is an essential part of your diet. Iodine is found in various foods (see Table 1). If you do not have enough iodine in your body, you cannot make enough thyroid hormone. Thus, iodine deficiency can lead to enlargement of the thyroid (goiter - see Goiter brochure), hypothyroidism (see Hypothyroidism brochure) and to mental retardation in infants and children whose mothers were iodine deficient during pregnancy. Before the 1920s, iodine deficiency was common in the Great Lakes, Appalachian, and Northwestern U.S. regions and in most of Canada. Treatment of iodine deficiency by the introduction of iodized salt has virtually eliminated the "goiter belt" in these areas. However, many other parts of the world do not have enough iodine available through their diet and iodine deficiency continues to be an important public health problem globally. Approximately 40% of the world's population remains at risk for iodine deficiency.