Q: the addition of potassium iodide as a nutritional supplement to common table salt would most directly affect the function of which of these glands? A: thyroid I know the thyroid gland produces thyroid hormones (i.e throxin) which is necessary for growth and neurological development in children. It also produces calcitonin to inhibit the release of Ca2+ from the bone. But, how does it actually involve with potassium iodide? I first picked the choice answer "aldosterone" which stimulates the secretion of K+ since I though high K+ concentration would cause adrenal cortex to make more aldosterone.