A poor diet that lacks essential nutrients generally causes nutritional deficiencies. The body stores nutrients. Therefore, a deficiency is usually detected after a prolonged lack of a nutrient. A number of diseases and conditionsâincluding colon cancer and gastrointestinal conditionsâcan lead to an iron deficiency.
Iodine is LIKELY SAFE for most people when taken by mouth at recommended amounts or when applied to the skin appropriately using approved products. Iodine can cause significant side effects in some people. Common side effects include nausea and stomach pain, runny nose, headache, metallic taste, and diarrhea.
Thyroid hormones are involved in many processes in the body, such as growth, brain development and bone maintenance. They also regulate the metabolic rate. Iodine deficiency is one of the most common nutrient deficiencies in the world. It affects nearly one-third of the worldâs population (9, 10, 11). The most common symptom of iodine deficiency is an enlarged thyroid gland, also known as goiter. It may also cause an increase in heart rate, shortness of breath and weight gain (8).