If you live in UK, and even more if you notice some of the listed below symptoms, the chances that you are deficient in Iodine are very high as most people living here do not do not ingest sufficient amounts of this vital mineral with food due to the soil depletion and other factors. If you are deficient in Iodine, you cannot make enough thyroid hormones. Thus, iodine deficiency can lead to hypothyroidism, fatigue, difficulty losing weight, cold intolerance, dry skin, muscle & joint pain, constipation, depression, mental impairment, forgetfulness, menstrual disturbances, impaired fertility, inability to concentrate, enlargement of the thyroid, and mental retardation in children whose mothers were iodine deficient during pregnancy. Read more