Iodine in biology damage). In areas where there is little iodine in the diet, typically remote inland areas and semi-arid equatorial climates where no marine foods are eaten, iodine deficiency also gives rise to hypothyroidism, the most serious symptoms of which are epidemic goitre (swelling of the thyroid gland), extreme fatigue, mental slowing, depression, weight gain, and low basal body temperatures. The addition of iodine to table salt (so-called iodized salt) has largely eliminated the most severe consequences of iodine deficiency in wealthier nations, but deficiency remains a serious public health problem in the developing world. Iodine deficiency is also a problem in
Latent iron deficiency previous conditions, the frequency can change from 11% in male athletes (Poland) to 44.7% in children less than 1 year old (China): Frequency of LID in different countries and populations: Latent iron deficiency Latent iron deficiency (LID), also called iron-deficient erythropoiesis, is a medical condition in which there is evidence of iron deficiency without anemia (normal hemoglobin level). It is important to assess this condition because it is accepted that individuals with latent iron deficiency will develop iron-deficiency anemia in the weeks or months following diagnoses of LID if they are not treated with iron supplementation. In addition, there is