In the past,<unk>  is an important public health problem in the world.<unk>  is an element needed for the production of thyroid hormone. It can be found in various foods such as breads, cheese, saltwater fish, cow’s milk and seaweed. If people do not take enough<unk> , they cannot make enough thyroid hormone. Thus,<unk>  can lead to goiter, hypothyroidism and cretinism. Usual signs and symptoms include a visible swelling at the base of your neck, a tight feeling in your throat, cough, hoarseness, fatigue, weakness, weight gain, depression, even neurological impairment. Blood tests of thyroid gland hormone level, the amounts of<unk>  in urine samples, ultrasonography and thyroid gland scans among a large population may be helpful for the diagnosis of<unk> . Treatments include<unk> d salt supplement and taking enough food rich in<unk> .
Iodine deficiency
Growth hormone deficiency
Congenital hypothyroidism
Constitutional growth delay
Thyroid hormone resistance
Congenital adrenal hyperplasia
Chromium deficiency
Vitamin A deficiency