Nutrient deficiencies: the production of thyroid hormones, communication from the brain to the thyroid, conversion of inactive to active thyroid hormones, and the utilization of thyroid hormones into the cells is highly nutrient dependent. Micronutrients like sodium, potassium, magnesium, calcium, iodine, selenium, zinc, inositol, glutathione, and other nutrients are needed for this to function. Demand increases during times of stress, inflammation, healing, injury, exercise, and growth.